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t3hw4h Samba Member
Joined: November 14, 2011 Posts: 136 Location: vancouver, BC
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Posted: Tue Jan 24, 2012 5:46 pm Post subject: sanding down a fibreglass bumper |
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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? |
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PDXWesty Samba Member

Joined: April 11, 2006 Posts: 6344 Location: Portland OR
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Posted: Tue Jan 24, 2012 5:48 pm Post subject: |
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I wouldn't get too aggressive on it. Use 220-400 lightly and wipe it down. You should be good to go. _________________ 89 Westy 2.1 Auto |
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0to60in6min Samba Member
Joined: November 27, 2006 Posts: 3456 Location: OR & CA (Oregon/California)
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Posted: Tue Jan 24, 2012 5:50 pm Post subject: |
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funny... I am in process to do it too...
thinking using orbital sander w. soft grit and using black bed liner coating... |
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t3hw4h Samba Member
Joined: November 14, 2011 Posts: 136 Location: vancouver, BC
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Posted: Tue Jan 24, 2012 7:18 pm Post subject: |
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so i don't need to get it down to the white coat? just rough it up a little? |
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0to60in6min Samba Member
Joined: November 27, 2006 Posts: 3456 Location: OR & CA (Oregon/California)
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Posted: Tue Jan 24, 2012 7:41 pm Post subject: |
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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. |
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madspaniard Samba Member

Joined: August 18, 2008 Posts: 3795 Location: Alameda, CA
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Posted: Tue Jan 24, 2012 8:11 pm Post subject: |
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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? _________________ 1991 Westy auto w/ Peloquin TBD
"The only difference between me and a madman is that I'm not mad” - Salvador Dali |
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K58 Samba Member
Joined: July 01, 2006 Posts: 1173 Location: Santa Barbara
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Posted: Tue Jan 24, 2012 10:17 pm Post subject: |
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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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