Sorry to hear that Mark. Yeah, a heavy clear job can melt it sad to say.
I've not had too much experience with One Shot and use HOK generally but if you saw my "mailbox" at SPI,it was done with one shot and it was rock hard after 1 day.I was sanding it with 1000 to knock it down and was going to use reducer to finish wiping it off with as I used reducer initally and it was not really touching it,so I was sanding it down to remove the most of it but I never got to finish it.LOL.....
I palleted my brush with thinner first and worked the one in and then worked more thinner into it so's it's not quite a thick as straight out of the can. That might have been the difference,I don't know.