- Apply Pat-Co Flat Wall Finish as it comes in the can. Composition Board - Priming Coat (First Coat) - One part Pat-Co Flat Wall Finish, one part BPS Clear Varnish Size. Foundation Coat - (Second Coat) - Use Pat-Co Flat Wall Finish as it comes in the can. OLD WORK - On all Surfaces - Shades -…
Finishes · Varnish · Paint · Enamel
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