First I want to say "Thanks" for all the replies. You have provided me some options of which I will Google-research.
I have used naval jelly 35 years ago on a car as a rust conversion, and in more recent years I have used CLR, Lime Away, ZEP, and muriatic acid for actual rust removal. It is best to knock off all loose rust beforehand for best results. Muriatic acid is most aggressive, quite the miracle product in removing rust fast and completely, but extreme caution is required in handling and ventilation. This product dissolves concrete. It disoloves bad rust in an hour or two. Some wire brushing might be needed along the way pending. I bought a huge light weight plastic pan for mixing concrete as a means to submerge large metal parts in muriatic acid. The beauty of muriatic acid is that you can dilute the acid with water to get gallons of effective solution. The acid is very cheap per gallon as well. When done, simply rinse with cold water and dry for perfect stripped-down metal, ready for priming. But in this case of mine today, I am limited to brush-on given I am working on the vehicle from below.
Muriatic acid is sold in hardware and home improvement stores. It must be used outdoors. Not even in an open garage unless you have a huge fan blowing in fresh air.
Thanks Again!
