Gerald Ross said:

In the last two weeks I saw a 12 x12 sheet of gasket material in some
woodworking catalog, but now I cannot find it anywhere. Anyone remember
seeing such stuff? This has been a senior day.

Hello Gerald,

I am using 1/16" Duro40 Buna-N (Nitrile) rubber sheet bought from an
industrial supplier. It comes in 3' widths, so I have a bit extra.

http://webpages.charter.net/videodoc...uumChuck01.jpg

Works for me, although the rim needs to be fairly even. I chose the
thinner material for stability although thicker material can be bought
and used for more uneven rims. It has proven to be resistant to
lacquer, sanding, tearing, and is fairly resilient. Seals very well.
(Off-center 1 lb can at 15" and 800RPM - 2.7mb video)
http://webpages.charter.net/videodoc...umChuck05l.mpg

Since you're somewhere in Georgia (I'm in ATL), if you can't find
something better, I could cut off a piece and swap it for a wood blank
or something - or send it to you for cost/shipping via USPS.

FWIW


Greg G.