On cleaning Plexi:  The most important thing is to get the dust off first,
before you start rubbing.  Most dust is silica, which is very hard, so no
matter what cloth or pad you use, if you start rubbing the dust around,
you'll scratch the plexi.  A good pressure wash followed by a gentle
sponging would be a good start.  The Novus products have worked well for

for ordinary stuff.  For nasty areas, however, like a big scuff or

wet-sand the area starting with 400 grit, then 600.  Then use a soft
(unstitched) cotton buffing wheel with a buffing compound specifically

for plastic.  There's a blue compound that's good, available from the
Eastwood Company (P/N 3010, 1-800-345-1178).  You need a fairly light

as it's pretty easy to melt the plexi and make a mess.

    My paint troubles now appear to be solved, but not before having

headache with PPG's Delta system.  No matter what I did with it, it
fish-eyed like crazy.  The tech reps blaimed contamination of my air

but a new filter / dryer, new hoses, and a new spray gun had no effect.  I
switched to Imron, and have had no further problems.  Also bought a forced
air respirator system (including a hood) from Hobbyair, which is very

The $500 investment seemed a good trade-off for not getting poisoned with
isocyanates.  Anyone contemplating using isocyanate-containing paints
(mainly polyurethanes) should check out the various web sites on

toxicity (CDC and others).  The paint store guys all say "Naah, no problem

. . " --- don't believe it.  The charcoal-canister masks won't cut it,
because the isocyanates are absorbed through the skin and particularly
through your eyes.

Jim Cameron, ES builder

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Message-ID: <ab.5f894a0.27a863dc@aol.com>

I queried Orin about this just before I bonded in the canopy plexiglass.

realized that MC on the plexiglass would be bad but didn't know what to

His answer was "isopropyl alcohol".  I have found that most drugstore and
grocery store rubbing alcohols are 70% isopropyl and 30% water, but the

at Von's (a local grocery store) is 99% alcohol.  Read the label.  The

won't hurt the plexiglass but it takes longer to dry.  Concerning what

to use -- I think Marv covered that.  I used my standard -- a cut up old
cotton t-shirt.

- Rob Wolf