The main reason/benefit why you should spray indoors in a sealed room is to stop contamination. As long as you have no-one near you when spraying, isocyanates soon disperse into the atmosphere if spraying outdoors.
Try and wear a mask though!
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Forgot to mention, wear the overalls suggested above too.
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I should have said extractors with filters.I think its the law.
as cyanide is a killer it has to be.anyone trying to use two/pack in anything other than recommended circumstances are asking for trouble.the reason for filters are to prevent the isocyanates reaching the atmosphere.I know it is illegal to use without.
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Was mech1
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I asked the man at the paint factors about the cyanide when he recommended it, and he screwed his nose up and said, yeah I know, but loads of people don't bother, as long as you do it outside and avoid the fumes, and wear an organic respirator, he said it's if you're doing it all day every day inside or getting it on you that it could be a problem.
Well, you just have to treat it with respect, wear thick layers of clothes, no bare skin, shower cap, goggles, gloves etc..... and don't sit around near the car when you've done a coat. I didn't go mad, and I'd use it again......In fact, superglue also gives off cyanide, and eating a cup full of apple pips contains enough cyanide to kill you!
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Several articles in Practical Classics mag have suggested that the sale of two-pack paint has been tightened up. Unless you can prove you are in the vehicle refinishing trade (presumably with an account with the paint factors) you won't be able to buy any two-pack paint.
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I spray a lot of PU based material at work, if there is any volume to the work you are doing (we do 30,000 units a year!) you should spray inside in a filtered room with extraction across the part of at least 0.5m per second. (This also helps carry overspray away from the part.)
Not that I advocate the spraying of isocyantes by anyone, but..
if anyone is going to spray on the diy, it is best to do it outside and NOT in a non-extracted room. In a non-extracted room, the isocyantes have nowhere to go, outside they disperse. Spray with the wind on your back.
As stated earlier by others, a paper suit (with a few layers on underneath,) a respiratory mask and a suitable pair of non-breathable gloves is what you need to be on the safe side.
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Thanks for all the info, I think i'll use cellulose, i've got a carbon filter mask so should be ok.
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There's also acrylic, which IIRC, is less prone to fading than cellulose is.
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