Marty, I did not contact them as it said on the box no returns after 15 days if I remember right, anyway I ran them thru a plainer 3 times then a drum sander 3 times then finished up with an air file. I put a qt of pelucid on as a sealer then blocked with 320. Then put 3 coats of Nason select automotive urethane and blocked with 500,then 3 more coats of clear.They are still a bit wavey but look and feel like glass
