I have not sanded the JB Weld yet but I applied it smoothly enough so it just needs to be scuffed enough so primer will stick. The wheels were rusty where they were almost in contact with the ground because of the very flat tires. There were pinholes that I filled with the epoxy. I might use tubes in case the rims are no longer "airtight".
The saltwater rust removal I mentioned is the electrolysis method. I have used it for 20+ years since first seeing it in the Gas Engine Magazine. The rusty part is submerged in salty water with a negative current connected while another metal part , with a positive connection is attached.I use my battery charger set to 12 volts on the next to lowest amp setting. My charger is an old school manual model. I understand an automatic charge doesn't work as well. A discharged battery might have to be included to "fool" the auto feature on the charger. The wheels were pretty crusty so I let them "cook" for about an hour on each side, meaning each side towards the sacrifice metal ( an old spring leaf). Two wheels, two sides each means four sides. When the wheels were removed from the water and washed of with my water hose they looked like they had been sandblasted. Try it. It works great. Salt is cheap. I bought a 25 pound bag last week at the grocery store for $3.99. I've been thinking about borrowing an automatic charger and figuring out exactly what would need to be done to use it. Anybody been there and figured it out already?
Edited by thom, February 26, 2017 - 05:31 PM.