fiberglass resin?
 

i need to sand down my bumper that i just repaired with a bunch of fiberglass resin, how should i do so and what should i use?

sand paper.. 320 and go up to smooth out.

start with 220 if you have a really uneven surface. if not 320 then up

thanks cause it is really un even right now. first time using the stuff

are you sanding it by hand or air sander?

i have to do it by hand since i have no sander whatsoever. and damn its a bitch.

If your sanding by hand go get a sanding block, it'll help so much and i would honestly start with 150 and work your way up from there.

thanks. ill do that when i get some money. the stuff im usin doesnt even say what number it is, i just grabbed it off a belt sander layin around. pretty rough though and it works okay.

oooh that might be a bit much...orbital sander or block like posted earlier will work for ya