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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#41
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Magic Scrubber?
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#42
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On 16/03/2012 16:51, William Sommerwerck wrote:
Magic Scrubber? Who is she, and why would she have any better ideas? -- Peter |
#43
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Magic Scrubber?
I meant Magic Eraser. Sorry. Who is she, and why would she have any better ideas? It's a he. Mr Clean. |
#44
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![]() In article , Jeff Liebermann wrote: Ye of little faith. I think it's cleanable because I've cleaned similar sticky rubberish goo from plastic in the past, without much difficulty. The difference here is that the plastic surface is textured, and seems to be trapping the goo. Cleaning a textured surface is a problem that I see all too often. However, my quest for the ultimate solvent may be futile. What I probably should be looking for is a better technique or tools. I'll be investigating brushes, rags, microfiber, mild heating, and such today. Possibly dunking it in a large ultrasonic-cleaner tank would help? The scrubbing cavitation bubbles might be able to release the hardened good from the surface texture. -- Dave Platt AE6EO Friends of Jade Warrior home page: http://www.radagast.org/jade-warrior I do _not_ wish to receive unsolicited commercial email, and I will boycott any company which has the gall to send me such ads! |
#45
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On Fri, 16 Mar 2012 09:37:33 -0700 (PDT), Robert Macy
wrote: stick with the STIFF toothbrushes, they have rounded bristles and don't seem to scratch much Have you tried to actually buy a stiff tooth brush recently? I went to two drug stores, and all they had was medium and soft. Hundreds of brushes in the display, and nothing stiff. I settled for a stiff laundry brush. Too soon to tell if it will work as I have customers bearing checkbooks at the door. -- # Jeff Liebermann 150 Felker St #D Santa Cruz CA 95060 # 831-336-2558 # http://802.11junk.com # http://www.LearnByDestroying.com AE6KS |
#46
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On Fri, 16 Mar 2012 11:56:04 -0700, (Dave Platt)
wrote: Possibly dunking it in a large ultrasonic-cleaner tank would help? The scrubbing cavitation bubbles might be able to release the hardened good from the surface texture. Good idea. The cavitation under the rubber might help break it loose. I don't have anything big enough, but know where I can borrow one (the local electroplating shop). Hopefully, it's high enough in frequency to produce sufficiently small soap bubbles. -- # Jeff Liebermann 150 Felker St #D Santa Cruz CA 95060 # 831-336-2558 # http://802.11junk.com # http://www.LearnByDestroying.com AE6KS |
#48
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In article ,
Jeff Liebermann wrote: On Fri, 16 Mar 2012 11:56:04 -0700, (Dave Platt) wrote: Possibly dunking it in a large ultrasonic-cleaner tank would help? The scrubbing cavitation bubbles might be able to release the hardened good from the surface texture. Good idea. The cavitation under the rubber might help break it loose. I don't have anything big enough, but know where I can borrow one (the local electroplating shop). Hopefully, it's high enough in frequency to produce sufficiently small soap bubbles. Somehow, that reminded me of the time one of the programmers took advantage of his ability to get into the building on weekends to de-gunk his motorcycle engine in the vapor-phase board cleaner at Pertec, lo those many years ago. The manufacturing folks never found out who did the deed, but they sure wanted to ... Isaac |
#49
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Have you tried to actually buy a stiff tooth brush recently?
How about the multi-length brush on an Oral-B electric toothbrush? |
#50
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On Sat, 17 Mar 2012 06:03:19 -0700, "William Sommerwerck"
wrote: Have you tried to actually buy a stiff tooth brush recently? How about the multi-length brush on an Oral-B electric toothbrush? I have some of those (the cheap model with the non-replaceable battery). The bistles are a mixture of plastic and rubber. They are quite soft and flexible. It's worth a try, but I don't expect anything useful from massaging the plastic case. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
#51
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![]() Jeff Liebermann wrote: A past owner had embalmed the printer in layers of bumper stickers, pogs, labels, and rubber cement. Most of this was removed by the vendor, but I think he just gave up trying to clean up the printer. I've tried alcohol, paint thinner, Goo Gone sticker lifter (citrus power), Oops! remover, WD-40, ammonia cleaner, and 409. All of these soften the gum and goo to various degrees, but leave enough imbedded in the textured plastic surface to make the printer look filthy. I hesitate to try a stronger chlorinated hydrocarbon solvent for fear of destroying the ABS plastic. I don't know if it harms ABS, but I've removed adhesive from ABS with waterless hand cleaner, like Gojo or Goop. It takes a few minutes to soften the glue. |
#52
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On Sun, 18 Mar 2012 13:39:40 -0700 (PDT), "larry moe 'n curly"
wrote: I don't know if it harms ABS, but I've removed adhesive from ABS with waterless hand cleaner, like Gojo or Goop. It takes a few minutes to soften the glue. http://www.imperialsupplies.com/msds0040210.shtml Mineral Spirits Propylene Glycol I've already tried mineral spirits. It didn't work on the rubberish goo imbedded in the textured surface. However, it can't hurt to try Goop as I have some handy. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
#53
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In article ,
Jeff Liebermann wrote: On Sun, 18 Mar 2012 13:39:40 -0700 (PDT), "larry moe 'n curly" wrote: I don't know if it harms ABS, but I've removed adhesive from ABS with waterless hand cleaner, like Gojo or Goop. It takes a few minutes to soften the glue. http://www.imperialsupplies.com/msds0040210.shtml Mineral Spirits Propylene Glycol I've already tried mineral spirits. It didn't work on the rubberish goo imbedded in the textured surface. However, it can't hurt to try Goop as I have some handy. Another cheap household chemical to try: Hand Sanitizer. Basically ethanol that doesn't evaporate (quickly), but all sorts of ingredients (Ethanol, Propylene Glycol, Vitamin E). They (Infectiguard brand) say it's not safe with all plastics. I had a jam jar come out of the dishwasher the other night with some old label residue, so I thought I'd double check my assertion about a soybean oil soak. Overnight, and it didn't touch it. ;-( Looking around, there was the hand sanitizer dispenser. Sliming up the affected spot with sanitizer and waiting for a couple of hours, it cleaned up the residue pretty well. Chances are, it will still be a war of attrition. Mark Zenier Googleproofaddress(account:mzenier provider:eskimo domain:com) |
#54
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![]() Jeff Liebermann wrote: On Fri, 16 Mar 2012 09:37:33 -0700 (PDT), Robert Macy wrote: stick with the STIFF toothbrushes, they have rounded bristles and don't seem to scratch much Have you tried to actually buy a stiff tooth brush recently? You want a typewriter or detailing brush. HF sells a set of three: Nylon, brass & stainless steel that are quite handy around the shop. They go on sale for 99 cents for the set of three, from time to time. -- You can't have a sense of humor, if you have no sense. |
#55
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On Tue, 20 Mar 2012 13:18:34 -0400, "Michael A. Terrell"
wrote: Jeff Liebermann wrote: On Fri, 16 Mar 2012 09:37:33 -0700 (PDT), Robert Macy wrote: stick with the STIFF toothbrushes, they have rounded bristles and don't seem to scratch much Have you tried to actually buy a stiff tooth brush recently? You want a typewriter or detailing brush. HF sells a set of three: Nylon, brass & stainless steel that are quite handy around the shop. They go on sale for 99 cents for the set of three, from time to time. I tried a variety of brushes with what seems to be the most effective solvent, Homax Oops. The stiff plastic brushes were ineffective. The stiff brass and stainless wires brushes tended to scratch the plastic surface, so I stopped before I destroyed the case. I'm having some success with sodium percarbonate (OxiClean) and hydrogen peroxide 3% bleaches. They're not removing the rubberish goo, but are doing a fair job of lightening the color, making the case more presentable. I was also able to remove some of the goo using sticky packing tape. The theory was that the glue would stick to the goo better than the plastic. It removed some, but most of the goo is too thoroughly embedded in the plastic. I'm going to give up shortly, and swap plastic parts with my identical office printer to make the customer happy. It's also time to start working on my taxes. -- # Jeff Liebermann 150 Felker St #D Santa Cruz CA 95060 # 831-336-2558 # http://802.11junk.com # http://www.LearnByDestroying.com AE6KS |
#56
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On Tue, 20 Mar 2012 16:06:50 -0700, Jeff Liebermann
wrote: On Tue, 20 Mar 2012 13:18:34 -0400, "Michael A. Terrell" wrote: Jeff Liebermann wrote: On Fri, 16 Mar 2012 09:37:33 -0700 (PDT), Robert Macy wrote: stick with the STIFF toothbrushes, they have rounded bristles and don't seem to scratch much Have you tried to actually buy a stiff tooth brush recently? You want a typewriter or detailing brush. HF sells a set of three: Nylon, brass & stainless steel that are quite handy around the shop. They go on sale for 99 cents for the set of three, from time to time. I tried a variety of brushes with what seems to be the most effective solvent, Homax Oops. The stiff plastic brushes were ineffective. The stiff brass and stainless wires brushes tended to scratch the plastic surface, so I stopped before I destroyed the case. I'm having some success with sodium percarbonate (OxiClean) and hydrogen peroxide 3% bleaches. They're not removing the rubberish goo, but are doing a fair job of lightening the color, making the case more presentable. I was also able to remove some of the goo using sticky packing tape. The theory was that the glue would stick to the goo better than the plastic. It removed some, but most of the goo is too thoroughly embedded in the plastic. I'm going to give up shortly, and swap plastic parts with my identical office printer to make the customer happy. It's also time to start working on my taxes. Laser ablation! Of course, not something one would have sitting around in the average garage workshop ... -- Rich Webb Norfolk, VA |
#57
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On Tue, 20 Mar 2012 21:39:31 -0400, Rich Webb
wrote: Laser ablation! Of course, not something one would have sitting around in the average garage workshop ... No problem. We have various local tech shops that offer their members the use of sophisticated and expensive equipment. http://makersfactory.com http://makersfactory.com/equipment/ They have a nice Epilog 10 watt laser. Over the hill, in Silly Clone Valley, is the better equipped Tech Shop. http://www.techshop.ws However, I question the efficiency of spending time and money getting qualified on the laser, in order to clean up about $30 worth of plastic parts. Of course, that assumes that the darker rubberish goo will vaporize and not melt the plastic. -- # Jeff Liebermann 150 Felker St #D Santa Cruz CA 95060 # 831-336-2558 # http://802.11junk.com # http://www.LearnByDestroying.com AE6KS |
#58
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...most of the goo is too thoroughly //embedded in the plastic//.
I think that "says it". |
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