Originally Posted by mr4speed
Agree with "no" on wet sanding poly primer and all the reasons you have given. The poly primer I am using now is super porous, would not even consider wet sanding this stuff as it would probably soften it up a bit. And this particular poly must be topcoated with an epoxy or 2K, hence the name its called "base primer".
the huge consensus I've found on the web is 'NO' as well. I can't even believe Evercoat makes the claim that it can be wet sanded.