i wet sanded my car today with 400gr and my bumpers turned white.

 

should i just primer it agin

 

When you sand primer, it's going to look different because of the composition. Especially when you lay it on wet and it flows over making a sealed/film over.

You don't have to spray more primer unless you're breaking through to the lower levels of metal or whatever.

The other alternative is to use a sealer, which is something like an epoxy primer, or a regular 2k urethane primer, reduced, sprayed on to the car wet like a basecoat to get it to be all the same color.

Hopefully that helps.

 

sooo...i dont get it, whats the problem?

 

so when i do the rest of my car it should turn white

 

just the bumpers...were the bumpers new? (like no paint on them previously?) if so, did you use bulldog on them first?

 

i agree.. ?

 

their was no paint on them

 

did you use an adhesion promoter before you sprayed?

 

yeah. but im just going to respray them and wet sand them with 400gr

 

Try sanding part of the car and see if it does the same thing. Primer will change color from before sanding to after. Pretty much anything will change slightly when you sand it, it's just how it works. There's nothing wrong though, as long as it's looking the same everywhere (as opposed to only doing it in some spots, which would indicate a problem).