I have some panels to re-spray from a machine tool and they need taking back
to bare metal as a previous owner has made a mess of a brush paint job in an
unknown paint type. Most are steel, but one panel is 2 mm aluminium and
about 1 metre square. I would sand blast it but I'm afraid that it would
damage it. I would use stripper, but many are based on Caustic Soda which
dissolves aluminium.

Suggestions please

Andrew

On 23/10/2014 13:56, Andrew Mawson wrote:
I have some panels to re-spray from a machine tool and they need taking
back to bare metal as a previous owner has made a mess of a brush paint
job in an unknown paint type. Most are steel, but one panel is 2 mm
aluminium and about 1 metre square. I would sand blast it but I'm afraid
that it would damage it. I would use stripper, but many are based on
Caustic Soda which dissolves aluminium.

Grit blast it, but use a soft medium, such as walnut shell.


--
Colin Bignell

"Andrew Mawson" wrote in message
...
I have some panels to re-spray from a machine tool and they need taking
back to bare metal as a previous owner has made a mess of a brush paint job
in an unknown paint type. Most are steel, but one panel is 2 mm aluminium
and about 1 metre square. I would sand blast it but I'm afraid that it
would damage it. I would use stripper, but many are based on Caustic Soda
which dissolves aluminium.

Suggestions please

Would an oil based stripper do the job? I've used this successfully in the
past but cleaning afterwards can be a pita.
What about a heat gun? Use a decent scraper with corners rounded off.

On Thursday, 23 October 2014 13:56:23 UTC+1, Andrew Mawson wrote:
I have some panels to re-spray from a machine tool and they need taking back
to bare metal as a previous owner has made a mess of a brush paint job in an
unknown paint type. Most are steel, but one panel is 2 mm aluminium and
about 1 metre square. I would sand blast it but I'm afraid that it would
damage it. I would use stripper, but many are based on Caustic Soda which
dissolves aluminium.

Suggestions please

Andrew



I use Nitromors on aircraft panels with no problems.

"Mr Fuxit" wrote in message
...

On Thursday, 23 October 2014 13:56:23 UTC+1, Andrew Mawson wrote:
I have some panels to re-spray from a machine tool and they need taking
back
to bare metal as a previous owner has made a mess of a brush paint job in
an
unknown paint type. Most are steel, but one panel is 2 mm aluminium and
about 1 metre square. I would sand blast it but I'm afraid that it would
damage it. I would use stripper, but many are based on Caustic Soda which
dissolves aluminium.

Suggestions please

Andrew



I use Nitromors on aircraft panels with no problems.

Trouble is they've 'safened' the formulation of Nitromors recently I
tried a bit of B&Q paint & varnish stripper on a small area. Took it down to
the primer fairly easily but very messy. It wouldn't shift the primer. I
also sand blasted a small off cut of 2 mm aluminium that I'd painted as a
sample of the new paint. Being reasonably aggressive with the cabinet
blaster I couldn't detect any noticeable thinning with a digital caliper so
that's promising, however I do worry a bit about distortion. For the full
scale thing I'll be using a Hodge Clemco full sized out door blaster (let's
blast a motorway bridge !) I once blasted an old hand rip saw and it came
out like a banana

Andrew

On Thu, 23 Oct 2014 19:06:41 +0100, "Andrew Mawson"
wrote:

I use Nitromors on aircraft panels with no problems.

Trouble is they've 'safened' the formulation of Nitromors recently

No shortage of methylene chloride on ebay.

In article ,
"Andrew Mawson" writes:
I have some panels to re-spray from a machine tool and they need taking back
to bare metal as a previous owner has made a mess of a brush paint job in an
unknown paint type. Most are steel, but one panel is 2 mm aluminium and
about 1 metre square. I would sand blast it but I'm afraid that it would
damage it. I would use stripper, but many are based on Caustic Soda which
dissolves aluminium.

You want a Methylene Chloride based paint stripper.
Trouble is, I think this is something the nannying EU decided you can't
have anymore, so it will be down to you having some old paintstripper
left from some years back.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]

In article , Andrew Gabriel
writes
In article ,
"Andrew Mawson" writes:
I have some panels to re-spray from a machine tool and they need taking back
to bare metal as a previous owner has made a mess of a brush paint job in an
unknown paint type. Most are steel, but one panel is 2 mm aluminium and
about 1 metre square. I would sand blast it but I'm afraid that it would
damage it. I would use stripper, but many are based on Caustic Soda which
dissolves aluminium.

You want a Methylene Chloride based paint stripper.
Trouble is, I think this is something the nannying EU decided you can't
have anymore, so it will be down to you having some old paintstripper
left from some years back.

Thank goodness it's still available for lab use eg:

http://www.amazon.co.uk/dp/B005H6QFHY
--
fred
it's a ba-na-na . . . .

fred wrote:

Andrew Gabriel writes

You want a Methylene Chloride based paint stripper. Trouble is, I
think this is something the nannying EU decided you can't have
anymore

Thank goodness it's still available for lab use eg:
http://www.amazon.co.uk/dp/B005H6QFHY

Surprised it doesn't say "frequently purchased together with wallpaper
paste" ...

In article ,
Andy Burns writes:

Surprised it doesn't say "frequently purchased together with wallpaper
paste" ...

I find those comments quite amusing at times.
13 or more years ago, I bought the O'Reilly Usenet book, as I was
taking over a running a peering usenet server. I mentioned it to a
colleague too, who might occasionally look at the server if I wasn't
around. He went to order it from Amazon, and it said "people who
bought this also bought 16th edition wiring regulations" ;-)
So he calls me and asks if that was me - yep it was! It seems most
unlikely there would be many other people in the world who would buy
both together.

Also seen this with things I've bought from CPC. In such cases, I
conclude that there are not a lot of sales of the specific item
other than those that I buy.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]

On Thu, 23 Oct 2014 22:25:50 +0100, fred wrote:



You want a Methylene Chloride based paint stripper.
Trouble is, I think this is something the nannying EU decided you can't
have anymore, so it will be down to you having some old paintstripper
left from some years back.

Thank goodness it's still available for lab use eg:

http://www.amazon.co.uk/dp/B005H6QFHY

Easily obtained in small bottles at some model shops as well ,used by
plastic kit builders to stick some of the more awkward plasics
together.
G.Harman

In article ,
fred writes:
In article , Andrew Gabriel
writes
In article ,
"Andrew Mawson" writes:
I have some panels to re-spray from a machine tool and they need taking back
to bare metal as a previous owner has made a mess of a brush paint job in an
unknown paint type. Most are steel, but one panel is 2 mm aluminium and
about 1 metre square. I would sand blast it but I'm afraid that it would
damage it. I would use stripper, but many are based on Caustic Soda which
dissolves aluminium.

You want a Methylene Chloride based paint stripper.
Trouble is, I think this is something the nannying EU decided you can't
have anymore, so it will be down to you having some old paintstripper
left from some years back.

Thank goodness it's still available for lab use eg:

http://www.amazon.co.uk/dp/B005H6QFHY

Unfortunately, that is unlikely to be in gel form which is ideal for
paint stripping, and is probably neat liquid form which will easily
run off and spill where you don't want it to go.

Also note that as a paint stripper consumer product, it came with
lots of important dire warnings, which might not be present when sold
as a chemical.

Funnily enough, I used some on Monday to strip the paint off a short
length of copper pipe before cutting it to splice in a full bore lever
ball valve.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]

In article , Andrew Gabriel
writes
In article ,
fred writes:

Thank goodness it's still available for lab use eg:

http://www.amazon.co.uk/dp/B005H6QFHY

Unfortunately, that is unlikely to be in gel form which is ideal for
paint stripping, and is probably neat liquid form which will easily
run off and spill where you don't want it to go.

Funny you should mention it but when I used the original Nitromors
product I always use the unthickened 'master craftsmans' ' product, more
active ingredient per litre and it still had just enough viscosity to
stick, much the same as a thin paint.

See Andy B's mention of wallpaper paste though for those wanting to
thicken it. Never done it but I assume that the cellulose goes straight
into the meth without any water pre-mixing?

Also note that as a paint stripper consumer product, it came with
lots of important dire warnings, which might not be present when sold
as a chemical.

Hey, Andrew (the other one) is a grown up (too) though :-)

--
fred
it's a ba-na-na . . . .

"fred" wrote in message ...

Hey, Andrew (the other one) is a grown up (too) though :-)



No, I refuse to grow up - I have however grown old

Andrew