Sand etch primer

I got the beetle to the etch primed stage and am just about to spray the high build filler/primer. Do I need to wet rub the etch primer before the next hb primer goes on? I am using Duxone primers by Dupont.

i wouldnt wet rub it but, i would sand it with at least 320 grit if not coarser for the high build primer to have better adhesion
matt