I don't see where you found the coil springs being rust oxide. They were either heat treated natural steel (Dark color) or painted semi gloss black, with paint marks identifying the application/optional equipment rating. The paint stripes were painted with a 1/2 inch wide brush, with the coil spring inverted as it would stand on its own, then brushed down each coil. This was not taped off, and quite crude. Drips from the paint would appear to run upward when the coil spring was installed, as the stripes again were painted while the coil was inverted. You will have to determine what options you have, i.e. engine size, power steering, ac, pb, etc., then look up what paint stripe colors you need to paint. Hope this helps.