I'm spraying a Dupont Nason 2K Urethane primer Gray. I've sprayed it on and it is almost clear with 3 heavy coats. Shouldn't it be gray??
Will
Original Post
Replies sorted oldest to newest
It should be gray....Did you stir the can well? Did you use a ratio cup ? It doesnt build as well as the Dupont, but for the price....its OK
Mike
Mike
I shook it, but evidently not enough. I had to use a screwdriver to mix uo all the solids stuck on the bottom.
I don't know why the fellow didn't sell me the Dupont. I asked for the best stuff they had. And they're a Dupont distributor.
BTW, it came out very grainy. Any suggestions? Not enough air? Too much?
Will
I don't know why the fellow didn't sell me the Dupont. I asked for the best stuff they had. And they're a Dupont distributor.
BTW, it came out very grainy. Any suggestions? Not enough air? Too much?
Will
Will,
Mike mentions a viscosity cup. its a ladel with a hole in the bottom and you mix the primer and thinner to the ratio the tell you to on the gallon can and then check it by timing it with a watch ..to how fast it drains out of the cup. I pour the primer in to a 5 gallon jug then pour in thinner to about the ratio called for on the can ... some times you have to dump the entire gallon of priemr in and make sure the bottom is clean and the entire gallon is mixed .. some important parts of the paint settle to the bottom.
Grainy means your too thick and too much air. The primer can will tell you ..
Try mixing 50 / 50 and about 35 psi ...what gun are you using ? make sure you have an air seperator on the compressor and disposable on the gun.
Ron
Mike mentions a viscosity cup. its a ladel with a hole in the bottom and you mix the primer and thinner to the ratio the tell you to on the gallon can and then check it by timing it with a watch ..to how fast it drains out of the cup. I pour the primer in to a 5 gallon jug then pour in thinner to about the ratio called for on the can ... some times you have to dump the entire gallon of priemr in and make sure the bottom is clean and the entire gallon is mixed .. some important parts of the paint settle to the bottom.
Grainy means your too thick and too much air. The primer can will tell you ..
Try mixing 50 / 50 and about 35 psi ...what gun are you using ? make sure you have an air seperator on the compressor and disposable on the gun.
Ron
Will,
By ratio cup, I meant a plastic cup with all the common ratios printed on it. Your paint supplier should of set you up with some. Then you would have the correct ratio of primer/activator/reducer. You are working with a 2K high build product. You should be using a gravity fed gun with @ 2.0 tip. Turn your fan spray knob down from full width. Full on with the trigger. Test your spray on some cardboard or masking paper. If what you have already applied is really rough, STOP. Sand it off. It can actually have air pockets in it that can cause you grief later on. If you are just priming spots, your second coat shouldnt run out to the edge of the first coat, and your third coat should be back from the edge of the second coat. That way you dont have rough/dry areas. Also, 2K builds up so if you stop each coat at the same place you are creating a hump/wave. Are you using etch primer on the bare metal ? You should.
Mike
By ratio cup, I meant a plastic cup with all the common ratios printed on it. Your paint supplier should of set you up with some. Then you would have the correct ratio of primer/activator/reducer. You are working with a 2K high build product. You should be using a gravity fed gun with @ 2.0 tip. Turn your fan spray knob down from full width. Full on with the trigger. Test your spray on some cardboard or masking paper. If what you have already applied is really rough, STOP. Sand it off. It can actually have air pockets in it that can cause you grief later on. If you are just priming spots, your second coat shouldnt run out to the edge of the first coat, and your third coat should be back from the edge of the second coat. That way you dont have rough/dry areas. Also, 2K builds up so if you stop each coat at the same place you are creating a hump/wave. Are you using etch primer on the bare metal ? You should.
Mike