I getting ready to try making a perfume aerosol and wonder what finish
should be used, that won't be affected by the chemicals in the perfume.
Anyone with experience care to comment?

I would use two-part epoxy. Not the thickened adhesive, but the coating. You
can get small quantities of epoxy in the form of System Three's RotFix resin
available at www.systemthree.com and I think the Woodcraft stores carry it, too.
Mix up a small batch, pour in, swish around for a couple of minutes and dump.

Dan