Belzona is kind of a JB weld on steroids product. But just like any other epoxy-based product, there are suitable applications and those which should be avoided at all costs. The same goes for flame spray, which has a critical application temperature a minimum and maximum repair thickness, Flame spray as in oxy fuel and powder is only one of several types of metalizing build up Technologies has advanced since I had my powder spray torch, mine was a Eutectic torch I could use either the Eutectic powder or the Stoody brand. If you think it is bad news to use a grinder on parts in a lathe think about the horrors of having molten powder sprayed on a rotating part. With all surfaces covered you can still turn a $20,000.00 dollar lathe into scrap metal in under 5 minutes.