Originally Posted by David R
Perhaps you could just buy a few pounds of 6013, 6011 or 7014. All are AC rod and for all position.
Baking the 7018 will dry it out but its still a DC rod.
If you have dirty metal, clean it.
I read somewhere that 7018 could be an AC or DC rod, but mine just says "7018", so it's probably made for DC like you say. I'll get a little starter kit of some of the 6 series rods.