I'm cleaning up a carvel plank boat that has been out of the water (stored indoors) for 20 years. This boat appears to have had a chronic oil leak as all of the bilge space below the floorboards and under the motor is covered with 1/8" clotted river silt bound with congealed motor oil. This stuff comes off in sheets with a putty knife fairly easily. Much of the volatiles in the oil have evaporated off in the 20 years that this boat has been sitting. The planking (mahogany) and frames (w. oak) are in excellent condition.
QUESTION: Is it possible to paint the bilge area and have the paint adhere? I was thinking of a light sanding w/60 grit after a thorough scraping, followed by several coats of thinned Petit Shipendeck paint. TIA for responses from those who have had similar situations.