I tried today with the seam grip having set about 18 hours. It worked fine. I even tried directly on the seam grip without the parchment paper and it didn’t look too bad after, but I’d recommend with parchment paper over without since I just tried one small area and suspect there’d be some melting if I were to do it elsewhere. Definitely my preferred way of fixing leaks although it’s kind of a pain to pump it up so many times to find the leaks then deflate and iron, but I have a foot pump to make it quicker. I’m pretty glad t it’s not too late to do iron touch ups at this point.