I'm repairing an old cedar canvas canoe that was glassed with polyester many years ago. I'm leaning towards patching it with glass and polyester resin and I'm wondering...do I use waxed or unwaxed resin? I'd really like to rip off all the old glass then redo the entire hull but the customer doesn't want to spend too much. Hence polyester rather than epoxy. The old glass is quite brittle in spots so I think I'll cover the bottom area with a new layer of glass over top of the old stuff after peelng off the loose stuff. Will that work? Does poly bond well to old poly?