: Hello Eric,
: I Use Epiphanes clear varnish so I called their technical support.
: They use denatured alcohol to clean the boat prior to varnishing.
: They also assured me that the varnish will not peel on
: contact with the alcohol.
: My tack cloths are now household dust cloths.

+1 on lint free rag dampened with denatured alcohol, although the jury is still out on prep for two part polyurethane varnish. I have yet to refinish my kayak with the evil fisheyes, so I can't say that I have solved that little challenge.

Best regards,

Allan Edie