I'm using SEM self etching primer with HVLP gun:
I've heard people say that you have to be careful not to apply primer too thick. I know thick primer is also a concern with it "lifting". In the past, I have applied it just until I reach an opaque green color over the part (usually 3 light coats). Is it better to have two light coats that is semi-transparent? I suppose even though you can still see the aluminum, it may be sealed already. Kind of like the wash primer that vans uses on their quickbuilds.
My problems could all be in the setup of the HVLP gun as it was my first time using it since converting from rattle can. I started out at SEM's pressure recommendation at something like 8 psi. But all that would do is spit drops of primer everywhere. I increased to 15-20 psi and it worked a lot better.
Bottom line, I need to do some experimenting on scrap before proceeding, but what were your remedies for this situation?
I've heard people say that you have to be careful not to apply primer too thick. I know thick primer is also a concern with it "lifting". In the past, I have applied it just until I reach an opaque green color over the part (usually 3 light coats). Is it better to have two light coats that is semi-transparent? I suppose even though you can still see the aluminum, it may be sealed already. Kind of like the wash primer that vans uses on their quickbuilds.
My problems could all be in the setup of the HVLP gun as it was my first time using it since converting from rattle can. I started out at SEM's pressure recommendation at something like 8 psi. But all that would do is spit drops of primer everywhere. I increased to 15-20 psi and it worked a lot better.
Bottom line, I need to do some experimenting on scrap before proceeding, but what were your remedies for this situation?