For the best result on spray painting, apply very thin layers, let each dry for 3 hours before applying the next.
And for the best finish you could go further and use a very fine wet and dry sand paper. Apply 3 coats of paint, waiting between each, then leave for 24 hours to harden. Then lightly wet sand the paint to remove any spray imperfections, and apply another final coat. Repeat as needed. If you wanted a shiny gloss finish you could then use a clear car paint lacquer as the final top coat.
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chrispy 22:48 16th September 2010