without reducing the UV protection? I replaced the slats on a couple of park benches with new white oak slats. No stain, just planned on three coats of spar urathane. I'd rather wipe it on, but its kinda thick and I'd like to thin it. Is there any detrimental affect on the UV protection? I figure I'll have to put on a couple extra coats to make up for the thin hand wiped coats.