I am redoing a hard top. Sanded off the gelcoat to eliminate the vinyl grain look. The fiberglass below is full of pin holes. Will regular plastic filler get in those little holes to fill them? Or a way to thin it so it will? I could use glaze/spot putty, but there are probably 1000 of these little holes spread all over the top. would rather use something I can spread faster than a few holes at a time.
I put some primer on to make it easier to see the holes in the pic...
pinholes.jpg
Hey Rob, when I did my hood scoop it also had those I used spot putty. Not the red but the newer green a lot easier sanding came out pretty good. Good luck.
Rob, use the polyester body putty/spot putty, it dries fast and sands nice, you can glaze the surface about a square foot at a time
with a 6" spreader moving back and forth over the holes otherwise they won't fill completely, the advantage is the poly dries up well and sands easily ,use a DA with 240 paper, like you said put it on THIN once you have the suface where you like it , I would seal it up with a good grade of epoxy primer like PPG shopline, then you can prime and bllock to perfection prior to painting.
Good luck
Dave
Thanks Dave!
Rob,
When working with old fiber glass, I recommend sealing it with several layers of gel-coat before applying fillers. If you use fillers to fill the pin holes without the gel coat, it will look good initially however over time as it sits in the sun new bubbles/pin holes will appear.
When you apply the gel coat you will need to sand it between the coats like you would with primer/surfacer. The gel coat is kind of a PIA to sand, but sealing it with gel coat is the only way I've found that works for good long term results without surface issues. (been there, done that)!
Bill
Evercoat Feather Fill products have been recommended to me - spray on or spot glaze available..
http://www.eastwood.com/featherfill-g2-gray-gallon.html