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what paint to go over cold galvenized on a triler
I thought I was doing therightthing by coating my trailer with cold galvenized paint, thinking it would look lke newish hot galvenize shee finish. ? I am now faced with a dull unfinished look. what can I re coat with to get something better.
Thanks to anybody that can advise Gerald Hosking |
what paint to go over cold galvenized on a trailer
On Saturday, 7 April 2018 18:05:25 UTC+1, wrote:
I thought I was doing therightthing by coating my trailer with cold galvenized paint, thinking it would look lke newish hot galvenize shee finish. ? I am now faced with a dull unfinished look. what can I re coat with to get something better. Thanks to anybody that can advise Gerald Hosking |
what paint to go over cold galvenized on a trailer
wrote in message
... On Saturday, 7 April 2018 18:05:25 UTC+1, wrote: I thought I was doing therightthing by coating my trailer with cold galvenized paint, thinking it would look lke newish hot galvenize shee finish. ? I am now faced with a dull unfinished look. what can I re coat with to get something better. Thanks to anybody that can advise Gerald Hosking Talk to an experienced clerk in a paint store. Automotive spray paint didn't stay on cold galvanizing very well for me. |
what paint to go over cold galvenized on a triler
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what paint to go over cold galvenized on a triler
On Sat, 7 Apr 2018 18:59:21 +0100, David Billington
wrote: On 07/04/18 18:05, wrote: I thought I was doing therightthing by coating my trailer with cold galvenized paint, thinking it would look lke newish hot galvenize shee finish. ? I am now faced with a dull unfinished look. what can I re coat with to get something better. Thanks to anybody that can advise Gerald Hosking IIRC Rustoleum do a bright cold galvanising paint as well as dull versions so maybe try some of the bright paint over what you have applied. I've used it myself and while not a perfect match for hot dip the bright cold galvanise paint looks much better than the dull stuff. And you can topcoat the cold galvanize paint with regular rustoleum (or just about any other enamel or acrylic) paint. |
what paint to go over cold galvenized on a trailer
On Sat, 7 Apr 2018 13:34:25 -0400, "Jim Wilkins"
wrote: wrote in message ... On Saturday, 7 April 2018 18:05:25 UTC+1, wrote: I thought I was doing therightthing by coating my trailer with cold galvenized paint, thinking it would look lke newish hot galvenize shee finish. ? I am now faced with a dull unfinished look. what can I re coat with to get something better. Thanks to anybody that can advise Gerald Hosking Talk to an experienced clerk in a paint store. Automotive spray paint didn't stay on cold galvanizing very well for me. "Cold galvanizing" refers to several different materials. The common one, from Rust-Oleum and others, is a reggular organic paint binder with up to 95% zinc powder. It's the least protective because it generally hresults in poor electrical contact among the zinc particles. It's often recommended to top-coat it and I'd just check with the company that made it for recommendations on preparing it for a top coat. Another material, one that I haven't seen for about ten years but which was popular for a while for coating boat trailers, is two-part epoxy paint with the same zinc powder. Top-coating epoxy is always tricky. It develops an "amine blush" on the surface from the amine curing agent. You can't sand it off; it just smears around. Acetone won't help, nor will other paint thinners. However, thankfully it's water soluble and the blush can easily be washed off with soap or detergent and water. My favorite is TSP, for the same reason that it's used for prepping walls for painting: it doesn't leave a residue. The third material is harder to get in ordinary consumer products but it's the best, and you'll find it from commercial sources. It's INORGANIC binder (usually ethyl silicate) with 90 - 95% zinc powder. The reason it's best is that it has good electrical conductivity with the surface and with the particles themselves. That's essential to get a true "galvanizing" effect, which is a sacrificial electrolytic phenomenon in which the zinc is the sacrificial anode. If you happened to get that, you'd better check with the supplier about coating it. It's the one that least needs top coating. Whatever you use, keep stirring or shaking the hell out of it as you use it, or you'll get wildly different percentages of zinc as you spray, roll or brush. -- Ed Huntress |
what paint to go over cold galvenized on a triler
On Sat, 7 Apr 2018 18:59:21 +0100, David Billington
wrote: On 07/04/18 18:05, wrote: I thought I was doing therightthing by coating my trailer with cold galvenized paint, thinking it would look lke newish hot galvenize shee finish. ? I am now faced with a dull unfinished look. what can I re coat with to get something better. the cold galvanize paint (at least CRC brand) is an excellent primer so you can spray just about anything over it. Another option if you live anywhere near TN is to have the whole trailer re-dipped. There's a company near South Pittsburgh that maintains a zinc pond about 100 ft long and about 75 ft wide. About 30 years ago I built an especially fine trailer and hauled it over to be dipped. Cost was modest. Still looks like the day it was dipped. This place is still there because I've sent people over that way in recent times. He will not dip anything with ANY rust on it. So the procedure is to have the entire trailer frame sandblasted, as quick as possible wipe on a coating of light lube oil (which burns off in the dip) and whisk it over there for dipping. John John DeArmond http://www.neon-john.com http://www.tnduction.com Tellico Plains, Occupied TN See website for email address |
what paint to go over cold galvenized on a triler
On 12/04/18 21:37, Neon John wrote:
On Sat, 7 Apr 2018 18:59:21 +0100, David Billington wrote: On 07/04/18 18:05, wrote: I thought I was doing therightthing by coating my trailer with cold galvenized paint, thinking it would look lke newish hot galvenize shee finish. ? I am now faced with a dull unfinished look. what can I re coat with to get something better. the cold galvanize paint (at least CRC brand) is an excellent primer so you can spray just about anything over it. Another option if you live anywhere near TN is to have the whole trailer re-dipped. There's a company near South Pittsburgh that maintains a zinc pond about 100 ft long and about 75 ft wide. About 30 years ago I built an especially fine trailer and hauled it over to be dipped. Cost was modest. Still looks like the day it was dipped. This place is still there because I've sent people over that way in recent times. He will not dip anything with ANY rust on it. So the procedure is to have the entire trailer frame sandblasted, as quick as possible wipe on a coating of light lube oil (which burns off in the dip) and whisk it over there for dipping. John John DeArmond http://www.neon-john.com http://www.tnduction.com Tellico Plains, Occupied TN See website for email address I had many things galvanised and always found it an excellent process and cheap for the protection provided, IIRC about 70 years + in normal environment and around 25 years + in a marine environment but that can be extended with additional surface prep such as grit blasting to get a thicker deposit. My local place isn't bothered about rust or mill scale as the first part is an acid dip to remove that followed by a flux dip, salammoniac IIRC, then the zinc dip. My neighbour priced it up against paint and the industrial plant he designed and the galvanise came out cheaper overall compared to paint as the paint required blasting and repainting from time to time. The main thing with galvanising is to make sure the bits are designed for it so the can drain and vent, interesting video of a non vented section failing in the dip tank here at 1:15 https://www.youtube.com/watch?v=C8EGUlerwVg |
what paint to go over cold galvenized on a triler
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