I built a stitch and glue kayak 10 years ago using a non blushing epoxy and covered the epoxy with an expensive water based cross linked polyurethane designed to be applied over epoxy and protect it from UV damage. After 10 years without maintenance the deck has some damage to the epoxy. I have sanded the deck and recoated it with epoxy. As there are now some one pack polyurethanes with very good UV resistant ingredients at a third of the price of the two pack products, I though that this time I would apply a one pack polyurethane over the epoxy. My problem is that the one pack products are designed to be applied over bare wood. I am hoping that after thorough sanding of the new epoxy to remove the gloss, the one pack polyurethane with bond well with the epoxy and give long term protection. Has anyone had any first hand experience of applying one pack polyurethane over epoxy? Reports of good or bad experiences are equally valuable.