On Sun, 16 Sep 2007 01:33:57 -0500, Jon Elson
wrote:

I still have to get the hang of aluminum, but I have actually
made a couple servicable, but truly UGLY welds! I need to keep
trying.
Jon

The aluminum base metal must be pefectly cleaned and degreased before
welding, otherwise you will get a mess. Tricloroethylene (sp?) is the
best solvent for cleaning it before welding, but this is pretty nasty
stuff. Avoid skin contact and breathing it.
Dave