I ask here because seems like the best place.

I am getting ready to install my SS front bumper cover and was wondering if I need to seal or coat the inside of the fiberglass at all? If not I am going to mount it do the body work and paint it right on the truck. Just wasn't sure if the back needed any attention. Thanks

 

Wouldnt is be better if you painted it off the truck in the first place?

 

IF I paint it off the truck I have to use flexible primer that is 3 times the cost of standard primer.

Painting it off the truck will not do anything for me. You can not see any of the backside with it mounted. It isn't a show truck either so no one will be looking in every crevis for an imperfection. That is why you paint parts off the truck so that they are "cut" in properly.