Re: soda media
I used a soda blaster on the grill, windshield frame, and other detail areas a sander could not reach on my sun's CJ-5 when we repainted it. We did not go all the way to bare metal on the main body, just the grill and windshield frame. We thoroughly rinsed both several times to get rid of residue. That was three years ago and so far no problems. We sprayed the CJ with a single stage polyurethane paint from Utech. It was our first try at painting a car and turned out nice.
Jbond is right it will make a nice mess because the soda is so light and pulverizes it self. It is hard on grass and plants. It acts like a desiccant and really sucks the moisture out of them. In high humidity areas it may not be a problem, but in arid Western Colorado it does. It won't work on rust either, at least mine unit will not.
It will me more expensive that some media because you really can't reuse it like some.
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