Is it always necessary to apply two coats of an exterior paint?

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Is it always necessary to apply two coats of an exterior paint?

Actually, if you are painting new siding or where all of the previous coating has been removed, you should first apply a coat of primer followed by two coats of paint. However, if the surface was previously painted and that old paint is still sound, a single coat ofa quality paint will probably suffice. Your local independent paint retailer can advise you as to whether two coats will be necessary for your particular situation.