Heat gun better than a blow torch for this
Gentle heat...keep fingers near guard while using heat gun...if your hand is uncomfortable, it's probably getting close to flash point for naphtha and well above melt point for adhesive.
Re: those PM's...I know it's hard to find 'Dentil Floss' - check the molding and millwork department at the BORG and specialty millwork stores - usually available by special order...when I was a trim carpenter's helper, it was a common job given to us newbs to go find the stuff at a local yard during lunch break. If you can't find any, always an option to use 'Dental Floss'. Just saying.