350 degrees???

Wow, I don't think I've ever used anything over 300 for final shrinking. I find sealing edges with anything over 250 leaves your nice, straight edge looking like it was cut by a drunk with an axe[:@]. I have my 21st century iron set at 215-225 for sealing the edges and then use 250-300 for final shrinking. My experience tells me that 350 on ultracocte would result in a wrinkled, petrified "wad" of covering. (Now Monokote, on the otherhand is just getting warmed up at 350...)