I used the boiling water to mold the stock tank. Unfortunately, the places I have to mold are very thick and would be hard to bend with the boiling water method (it doesn't seem to get as hot as using a heat gun). I think I will need more heat than that, so I may have to try to the heat gun. If I push through the plastic, he said he would be able to just weld it up. He suggested I try first and he would be able to weld it up if I had any issues. He seems like a really nice guy, and I was impressed that he tried to help me before selling me services.