>>I build a *** canoe about 10 years ago and I am planning to make
modifications. I built the canoe using polyester resin and I would like to
resins for my modifications. The canoe has been finished with marine grade
Does anyone have any suggessions for the easiest way to strip the
polyurethane without harming the polyester resin?
My main question is: Will I be able to get good adhesion between the epoxy
and the polyester resin? Is there any particular surface prep that would
increase the bonding?<<
The proper stripping method is called sandpaper. Start with 60 or 80
grit. If you used a two part polyurethane then there is no way a chemical
*** can attack the polyurethane without zapping the polyester. If
you used a one part polyurethane you might try acetone and see if this
lifts the polyurethane coating. the sand until the polyester powders.
You don't need a "tie coat" between the epoxy and polyester. The epoxy
will bond very well to sanded polyester.
System Three Resins, Inc.
Technical Support: 206/782-0818
Orders Only: 800/333-5514
P.O. Box 70436
Seattle, WA 98107