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  View original topic: sanding down a fibreglass bumper
t3hw4h Tue Jan 24, 2012 5:46 pm

So I have a replacement rear bumper that I need to sand down and paint (black).

Any tips for the sanding process to make it as quick and hassle free as possible?

Any tips for painting it?

PDXWesty Tue Jan 24, 2012 5:48 pm

I wouldn't get too aggressive on it. Use 220-400 lightly and wipe it down. You should be good to go.

0to60in6min Tue Jan 24, 2012 5:50 pm

funny... I am in process to do it too...

thinking using orbital sander w. soft grit and using black bed liner coating...

t3hw4h Tue Jan 24, 2012 7:18 pm

so i don't need to get it down to the white coat? just rough it up a little?

0to60in6min Tue Jan 24, 2012 7:41 pm

you just rough it out, do a under/primer coat, color coat and clear coat, if you fancy to that.

For me just one coat of bed liner is enough, I like a rough looking appearance of the bumpers.

madspaniard Tue Jan 24, 2012 8:11 pm

Funny, I need to do the same as well, my fiberglass bumpers were painted with a professional glossy finish and they now show a fair amount of chips where I can see a white coating underneath, I think I need to remove all the glossy layer down to the white coating for a flat smooth surface before applying bedliner.

Anybody has instructions on how to remove the bumpers and the front body side trims pieces?

K58 Tue Jan 24, 2012 10:17 pm

I patched my cracked front bumper with quick cure JB weld, sanded with 3M 400 scotchbrite and sprayed with Napa Stoneguard.
Unlike Bedliner which IMO is way too rough, Stoneguard has a very even light texture that that looks "OEM" instead of "Driveway"




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