Molasses works in a very few cases. The part HAS TO BE CLEAN AND PAINT FREE. And it takes at the least 2-3 days for a small part, and weeks for a larger one.
Just sandblast the parts. With the proper media you will be done in minutes and not damage the part. I sandblast at 40PSI and regularly do entire doors and panels with no ill effects.
Coke and molasses are completely different processes and they would not compliment each other. Molasses sugar ferments and one of the byproducts is an acid that eats the rust. Phosphoric is an acid itself and would prevent the fermentation.
Bottom line is that molasses sucks as you have to preclean (might as well sandblast) and wait days (might as well sandblast and paint and install by the time the molassis is even half way done).
