I've ordered some pickling paste (made my Harris) from the local welding shop. Runs about $45.
I've looked on-line and there seem to be several machines offered that will provide an electric current to some paddles/wands that when applied to a stainless steel weld soaked in their "solution" will magically remove bluing, scale and discoloration; without any abrasion or scratching. I've talked to a few welders that seen it done, so it appears to work. However the machines look pretty simple, and they are PRICEY ($1,000 to $3500). Is it just a transformer generating about 50 volts AC?
Thank you in advance for lending me the benefit of your experience.