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How many layers of oil paint

That was exactly my reaction. I worked in boatyards for a few years when I first got out of college in the mid-70s. It was indeed possible to become sensitized to epoxy, but it was rare and usually confined to guys who took little care to minimize contact, and then bathed in solvent to clean up.

Isocyanates on the other hand were a much bigger problem. On days when there was spraying going on I'd go home if there was nothing to be done away from the shop.

I've painted several machines and a couple Lista cabinets with epoxy. If you're going to brush experiment first. The Rustoleum paint I use sprays very nicely once you get used to the high viscosity, but it does not level well when brushed.

Reply to
Ned Simmons
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Also especially with epoxy paints the surface has to be clean, very clean. Do not use silicon spray cans anywhere around the machine after you prep it for painting. The silicon spray lubricants will cause the paint not to bond properly. The sprays can travel a great distance in the air.

When I paint my machines I use a spray sandable primer surfacer aerosol can. The local surplus place sells some real good spray paint for a buck a can. It covers a lot of chips and scratches. I usually use an alcoyd paint for the top coat. The last couple machines I just used the spray can and then touched up the lettering, handles and misc, levers with a paint brush and oil based paint. Of course all my machines are working commercial shop machines but the spray paint still holds up well and with the spray cans it makes it easy to touch any problem areas.

John

Reply to
john

I was assuming spray painting. I think that brush painting would not be as hazardous, unless you move your brush at supersonic speeds. :-) After all -- the problem is inhaling the curing agent, I believe.

Certainly so if you spray -- and probably a good idea even with a brush. But this will give you plenty of time to prime it (as needed for the paint you choose) and let it dry fully. :-)

I'm not sure how thick it would be -- which could be a problem with brush marks brush painting. Of course, with spray, you need to keep in mind the cure time and clean the spray gun well before each batch you mix up gets close to cure. :-)

Good Luck, DoN.

Reply to
DoN. Nichols

Yes, or "curing agent". The curing action is catalytic polymerization, which converts the resin to a thermoset material. Hence "catalyst" is an appropriate term for what an epoxy hardener is in principle.

Reply to
Richard J Kinch

Maybe. But we maintain the myth that there is a difference.

Viva la difference!

Reply to
cavelamb

I happened to meet a couple of Du Pont engineers visiting from Germany. They work for the car paint division. And asked one about painting, specifically about how many coats of primer. He said one coat of primer. But then added that they are in the midst of rolling out the second generation of water based automotive paint. It consists of a base coat with the color and a clear top coat. NO PRIMER.

That sounds pretty neat to me. Automotive paint which ought to stand up to exterior conditions. Just one coat if you don't need a clear coat. And water clean up. Will have to see if I can find out more.

Dan

Reply to
dcaster

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