Thank you all for the info.

The chart on the door shows 20ga max for aluminum. 1/8 max for steel.

It has both DCEN and DCEP. I cannot put pictures on here.

I have searched but could not see an answer to my question. Instructions show reverse polarity for welding aluminum but could not see any other info. Can I use aluminum wire in machine as is or do I have to change parts? Don't have the want to buy a spool gun at this point. Thanks

I have been looking at this site for a while and now joined. Want to up my knowledge and also learn to weld aluminum. I've been building drag cars and hot rods for years. Currently have a 57 Chev Belair wagon, a stock 51 HenryJ and another HenryJ that I am slowly building as a street gasser. Also sh...