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Discussion Starter · #1 ·
12v battery charger, sodium bicarbonate from the spa store or similar, plastic tub, soap and water.
Remove grease and dirt with soap and water, mix 1 tbsp sod bicarb per gallon in a plastic tub. Connect neg charge lead to work piece, pos to a raw steel scrap piece. Do not use stainless as scrap piece. Submerge rusty part, place pos scrap steel 1" or less from rusty part.
BE SMART! YOUR DEALING WITH ELECTRICITY!
Turn on charger and close the gap between the sacrificial scrap and rusty part until amp meter shows 2 or so. Let it cook.
Lots of vids on yoooootube! BE SAFE!
 

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Discussion Starter · #2 ·
The middle pic is only 40 minutes after starting. The rust cooks off and comes to the surface. When done just use a green scrub pad and soap and water. Rinse, dry prep and paint.
 

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Graphite or carbon rod for positive does not generate nearly as much crusty junk like your picture shows.
 

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Discussion Starter · #4 ·
Good to know, this is my first attempt. I'm going to do a pair of calipers next.
 

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I've had good success with this: https://www.oreillyauto.com/detail/b/ev ... over&pos=3
Just submerge the rusty part until the rust is dissolved, you can even re-use the liquid but the effectiveness is reduced. Make sure the container is plastic, not metal or glass.
 

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Discussion Starter · #6 ·
Kinda eliminates the potential of bad things happening which kinda ruins the fun. But I think I'll try it. Thanks for the tip.
 

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robb5 said:
Kinda eliminates the potential of bad things happening which kinda ruins the fun. But I think I'll try it. Thanks for the tip.
I've also used coca cola to dissolve rust off small parts..the high sugar original classic coke, eats the rust up....then again, imagine what it does to your insides, if you;re a huge coke drinker....lol
 
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