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Final Exterior Finish

Final finishing is important for cosmetic reasons and to protect the epoxy from ultraviolet light.

1. Allow the final sealing coat of epoxy on the fairing compound to cure thoroughly.

2. Wash the surface with a Scotchbrite pad and water to remove amine blush.

3. Sand to a smooth finish.  The amount of sanding required will depend on how smoothly you applied the final epoxy coatings and which finishing system you choose.

If there are runs or sags in the epoxy coating, begin sanding with 80 grit paper to remove the highest areas.  Sand until the surface feels and looks fair; then switch to 120 grit wet or dry paper. After all the scratches from 80 grit paper are removed, switch to 220 grit paper, then on the finest grit that meets your needs.  If a primer is used, 80 grit is usually sufficient.  After you are satisfied with the texture and fairness of the surface, rinse the surface with fresh water and dry it with clean paper towels.  Proceed with your final coating operation, following the specific instructions of your paint or coating system supplier.

It may be a good idea to make a test panel to determine required surface preparation and finish compatibility.