Does it still come in only red?  I thought at one time in came in a pea green color.  I can't put red on any engine or I would run it.  (superstitious.  had bad luck with red engine parts)  I stick to the sanding discs like mentioned above, but see Glyptal used a lot.  Better than "cast coat" paint some cheepie shops use that comes off the first heat/oil cycle...