This is a tip that I just picked up today actually, as I am pouring a muzzle cap on a rifle that I am building, Its has a much larger than standard end cap with several different angles terminating to my ramrod channel so I was forced to do more than one pour.... Heating your area with a heat gun is a good tip just to help your pewter flow better into the smaller areas if your trying for a fingered cap or aid in the bonding to lessen the chance of a cold seam. On my second pour I ran into some fault lining in my pour while filing it down, by taking a standard 10,000 rpm hand grinder and a wore out 100 grit sanding disc, I was able to actually move pewter almost like buffing out a scratch in a car from one seam to another.... As long as its a woren out sanding disc it actually heats the surface of the pewter up to slightly move it around from one area to another, dont know if itll help anyone out just kinda wanted to finally be able to post something after reading on here for so long..... A.J.