Wow, those photos should be on the commercial for Rustmort!
Better yet, maybe we should re-label this stuff in 2oz bottles
and sell it online.
I was asked in an PM to detail application, but I'll explain it here.
This product is made to neutralize rust before painting and it seems to just suck it right out of the pores and up onto the surface. Works best on white and won't hurt color but it will stain if left on too long.
Spray it or dab it on, I watch it work for about 20 minutes, brushing it gently and then rinse. I try not to rub directly on the painted letters, and just let the chemicals do the work.
Keep in mind the white paint is pretty thin after all these years so excess rubbing on a stubborn spot, or buffing should be done with care. I always experiment on a small section on the back of each machine to start.
Since this project will require such a small amount of material, there is plenty left in the bottle for other uses like rust on chrome or fasteners, and especially the surface rust on the floor of inner linners.