I have been using Miratech trim for the first time. I needed trim that I could do a little routing on and something that didn't expand and contract like pvc. I had a sample from the lumberyard so I threw it in my doggie pool and let it float around for a couple of weeks unprimed and then let it sit in the weather for another week. Still looks like new and there wasn't any swelling at all. I don't know if I'll ever use anything else again. I don't know why it took me so long to find this stuff. Anyone else have any new products out there that they've been impressed with lately.