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Old 06-05-2014, 05:31 AM   #1
FredRydr OP
Danger: Keep Back 500 Ft.
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Joined: Aug 2005
Location: Carlisle Pennsylvania USA
Oddometer: 2,477
Question Sandpaper grits for sanding matt black plastic cases?

What is the progression of grits for sanding BMW system cases? I'm just cleaning up the surface in spots, and not trying to remove gouges. I will be working on a matt black Vario case, but I assume it'd be the same recipe used on the older system cases that inmates used to touch up with sandpaper.

Thanks! And no, I won't be using my belt sander!

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Old 06-05-2014, 06:16 AM   #2
southern cross
Joined: Dec 2009
Location: Blue Mountains
Oddometer: 371
I would use Aluminum Oxide paper ( white in colour) as it resists clogging up more than some other papers. I'd start with 800 grit and go from there.
This reminds me that I too need to clean up the Vario top box on my gs1200. The PO had the box take a tumble, which like many BMW top boxes, shook free when the bike hit a large pot hole hidden in dappled sunlight. The design is a good idea but lacked proper testing prior to full production IMO.
The box is now secured by two round head bolts. Don't fancy loosing it and or contents down some back country road.
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Old 06-05-2014, 04:27 PM   #3
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Location: Savannah, Georgia
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The plastic used for the Vario cases is softer than the old System cases. You can still do the deed, but you'll want to stop before you get to the heavy grit stage. Softer plastic will start getting "stringy" with heavy grit.
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