Painting Sheetmetal???

I reciently built a cyclone and would like to paint the sheetmetal. Is there anything special I need to paint it w/. Or anything special I need to do b4 I paint it? Im assuming something like normal spray paint would work fine.
TIA Rob
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Clean off any oils. Use a metal primer, then spray paint as you'd like.
You can also get it powder coated if you want it to be fancy. Ed
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Proper way is to wash down the metal with a phosphoric acid solution to etch the metal then cover with a base primer (DuPont Variprime). Follow by a sealer or just top coat with a good acrylic enamel or lacquer. (basically what one would do when painting a car)
If you want cheaper: wipe down the metal to remove _all_ grease, you can do this with acetone or lacquer thinner. It would be good to etch the metal with some weak acid solution but some spray primers have this as part of their solvent base. Paint with a good metal primer (the primer is the most important part, good primer, good service life) Topcoat with a quality (enamel) paint.
-Bruce
Rob V wrote:

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What he said. Tom
Someday, it'll all be over....
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You can use vinegar to etch it also.
Bruce Rowen wrote:

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Bob Stewart wrote:

Yes, vinegar will work but you need to be a bit more careful about the pre-paint cleanup. Vinegar treated steel will rust in short order an you'll be back to square one unless you get the residue off and metal primed asap.
What the phosphoric acid does for you is it converts and surface oxidation into some form of hard rust (iron phosphate???) that forms a great bond between the primer and metal. Back when I painted lots of cars I would get the stuff from any auto paint store, the DuPont product name was "Metal Prep" IIRC.
Look at the deck wash and tile cleaning stuff at hardware/homecenter stores. Some times it'll be phosphoric acid based, color is usually pinkish or greenish. Avoid the muratic acid based stuff.
Good 'ol vinegar followed immediately with a solvent washdown will probably be good 'nuff (and cheaper) for what you are trying to do.
-Bruce
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Great - thanks for the info.

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what the others said, and zinc chromate primer is good stuff to prime with.
dave
Rob V wrote:

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but REALLY not good to breathe. wear the correct mask for this, and that doesn't mean a paper mask.

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