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Old 07-06-2015, 05:47 AM   #40
FF
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Join Date: Oct 2007
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"The house floor sanding operators use vicious machine mounted drum sanders for stripping old timber floor finishes"

The sand "paper" they use is fantastic for sanding most anything .Sold at most rental places.

It is silicone carbide , and the #16 or #24 looks like rocks stuck on stiff cardboard.

It does not gunk up, even on fresh GRP with no wax , or old bottom paint 1/2 in thick.

I use an auto body grinder with a thick (2 inch) Bear Manning pad and disc sanding glue to stick it in place.

DO not cut the material round ( 2 -4 ft will do most boats) , just cut or snap it square so the corners are intact , and will help not creating wavy surface.

VERY light pressure is required a light weight sander is easier to control than a big 15A,, 15 lb monster.

A 100 sq ft area just being cleaned for painting should be 20 min ,after you get the hang of it.
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