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For polishing plexi, I routinely use two different methods.  For parts you
can hold in your hand, I use a cotton buffing wheel (2 pads on the spindle,
actually) from which several rows of the stitching have been removed so it
fluffs more and is not so hard.  With the wheel I use a blue buffing rouge
that I get from the Eastwood Company, P. O. Box 296, Malvern, PA 19355,
800-345-1178 (they sell a lot of things for restoring classic cars - like
the plexi side curtains in an Austin Healy 100-6 I had about a hundred years
ago).  The blue rouge will buff out almost anything, even deep scratches,
but you do have to watch the heat buildup.  If the scratched area is really
bad, wet sand it first with 400, then 600.  For hard to get at small places
or large stuff I can't hold under the buffing wheel, I use plastic polishes
from Novus, Inc., in Minneapolis.  They make three products, numbered 1
through 3.  Nos. 2 and 3 are polishing creams, the #3 pretty coarse, and #2
a fine grit.  Both can be used by hand rubbing with a soft cloth or with
cotton buffing wheels (in a Dremel tool, e.g., but be very careful about
overheating at the high rpm of a Moto-tool).  The No. 1 is a cleaner with
maybe some fine polishing action plus an antistatic ingredient.  All work
very well and have no nasty side-effects on the plastic.  They are available
at a lot of plastics dealers, but the back of the bottles says you can call
1-800-548-6872 for the nearest distributor.

Jim Cameron  (once & future ES)

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