How to Metal Polish a Valve Cover for My Civic
- 1). Grind away any remaining black paint from the valve cover using the 400-grit disk. If the valve cover is from an imported Type R Civic, it will be red. Make sure all of the paint is removed completely.
- 2). Use the 800-grit sanding disk and the grinder to go over the entire valve cover again. This removes any remaining paint and smooths the surface.
- 3). Pour liquid metal polish onto a polishing pad or cotton towels. Use the polisher or cotton towel and your hand to apply the polish to the metal valve cover. Work in very small, circular motions for the best results.
Source...