02-12-2010, 07:25 PM
If the powder is chipping and peeling its because he has poor prepping methods. Alot of coaters that are popping up are just coating over whatever is there. There isnt much difference in powder coating than painting cars, its all in the prep work! if you spray a car and dont sand it down whats going to happen? the paint WILL peel off. It could also be that hes not fully curing the parts.
What do you mean by "slightly textureized the metal"? Everything with the exception of sheet metal should be thoroughly blasted, this takes you down to virgin/white metal, done with an adequate media you should have a sterile surface for coating and the desired texture to maximize adhesion. 80 mesh aluminum oxide is the most popular, aluminum that has been carefully blasted at 40-60 psi (depending on blasting setup) will give you a super soft blast profile that is perfect to coat over. a blasted surface that is blasted with a coarse media is destroying the metal for 1, and leaves you with peak and valleys that are too large to coat over, this causes orange peel, micro pinholing and air pockets that will leave bigger pinholes from the air escaping during the cure. You want the blasted finish to feel like a pieces of 400 grit sand paper, not a 60 grit sanding disc.
proper blasting and washing of the metal will make the coatings look like glass.
What do you mean by "slightly textureized the metal"? Everything with the exception of sheet metal should be thoroughly blasted, this takes you down to virgin/white metal, done with an adequate media you should have a sterile surface for coating and the desired texture to maximize adhesion. 80 mesh aluminum oxide is the most popular, aluminum that has been carefully blasted at 40-60 psi (depending on blasting setup) will give you a super soft blast profile that is perfect to coat over. a blasted surface that is blasted with a coarse media is destroying the metal for 1, and leaves you with peak and valleys that are too large to coat over, this causes orange peel, micro pinholing and air pockets that will leave bigger pinholes from the air escaping during the cure. You want the blasted finish to feel like a pieces of 400 grit sand paper, not a 60 grit sanding disc.
proper blasting and washing of the metal will make the coatings look like glass.




