Hi Evan,

I thank you for your valuable information, but have a question...

(Well, two, now that I think about it g)

Is there a downside to the more durable epoxy+microbaloons approach?

Yes, it is a bit harder to sand and takes longer to harden - basically
several hours to overnight. Probably cheaper than the 3M stuff.

And, also, the substrate is polyester. Can I use epoxy over that? Or
would I be using my resin with the microbaloons?

You can use epoxy over polyester but not vice versa. Polyester doesn't
stick too well to cured polyester.

--
Evan Gatehouse

you'll have to rewrite my email address to get to me
ceilydh AT 3web dot net
(fools the spammers)