> Wanted to know the cheapest place to buy epoxy in the Portland Oregon
> area, thanks!

Don't know if its the cheapest, but it will be competitive: West Marine, Boater's World, and Fisherman's Supply, all in the Janzen Beach area. West Marine is usually very good about price matching. I've even taken in internet print outs and they've matched them. Some of the folks at West Marine are more knowledgeable than average, too.