How about some helpful info on avoiding sand-thrus! I paint mostly motorcycles and seem to always have some kind of sand-thru somewhere along the line. Anyway I thought on the old web forum there was some info on epoxy adhesion to different grit on bare metal. I put 2 coats of epoxy on a fender and blocked with 80 grit, came back in about 3 days later and laid down 3 coats of epoxy with a flash time of 30 minutes between each coat. So after a day I decide Ill wetsand with 400, let set and this weekend spray 1 epxy sealer coat and go to base. Anyway while 400 I made a sand-thru!!!! So should I scuff that area with 80 and reshoot or what???
Dilema 2, Have a outer fairing (Harley) 180 grit and let it set out in the sun for awhile. Sprayed 2 coats of epoxy, 10% reduced. Laid down pretty good. Went to 600 grit but guess what, SANDTHRU, So now what? Will the epoxy stick to a 600 on fiberglass(gelcoat)?
Maybe I just needed to vent. And having to sand around those front fender rivets. UUUGGGHHH! What is some tips? Maybe since Im just using epoxy, I dont have enough mil thickness to start with?? THANKS!
Dilema 2, Have a outer fairing (Harley) 180 grit and let it set out in the sun for awhile. Sprayed 2 coats of epoxy, 10% reduced. Laid down pretty good. Went to 600 grit but guess what, SANDTHRU, So now what? Will the epoxy stick to a 600 on fiberglass(gelcoat)?
Maybe I just needed to vent. And having to sand around those front fender rivets. UUUGGGHHH! What is some tips? Maybe since Im just using epoxy, I dont have enough mil thickness to start with?? THANKS!