PackardV8 wrote:
.......i have yet to have anything explode on me nor even flame.

Tho i would never try it BY MYSELF i have assisted in soldering tiny leakes in gas tanks ON the car where a torch was used to heat the tank and smear the tinners paste while applying the small brass patch. My job was to keep the seeping gas wiped off from the seaping hole and to cover any flame with a large rag that mite occur and to hand supplies and to hold the brass patch in place until it cooled. THE SECRET IS TO HAVE THE TANK **** FULL ***of gas. As in FILLED to the top.