HI Steve,
I use 5/32" stainless steel wire and I know Joe Stafford uses 1/8" 1100 aluminum wire for his alloy bodys. Speedy metals carries all the different wire sizes, for steel I would recommend 1018 material.
Hope it helps,
Bill
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Bill Tromblay
"A sign of a good machinist, is one who can fix his F$@& Ups" My mentor and friend, Gil Zietz Micro Metric Machine.
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