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How Much Paint Do I Need?
One of the most common questions that people ask is 'How much paint will I need for my boat?'
This is a difficult question to answer because much depends upon how heavily the painter applies the paint. We can generalize and assume that we are covering the surface as thickly as possible without runs. These recommendations are for two coats of paint.
| Size & Type of Boat | Bottom Paint | Topside Poly | Topside Enamel | Waterline | Deck | Interior |
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| 10' Dinghy | | 1 qt | 1 qt |
| 14' Outboard | 1-2 qt | 1 qt | 1 qt | 1 qt |
| 18' Runabout | 2 qt | 1 qt | 2 qt | 1 pt | 1 qt |
| 20' Sailboat | 3 qt | 2 qt | 2 qt | 1 pt | 1 gal |
| 24' Runabout | 3-4 qt | 2 qt | 2 qt | 1 pt | 1 qt |
| 30' Sailboat | 1.5 gal | 3 qt | 1 gal | 1 pt | 2 qt | 2 qt |
| 32' Cruiser | 1.5-2 gal | 3 qt | 1 gal | 1 pt | 2 qt | 2 qt |
| 36' Auxiliary | 2 gal | 5 qt | 2 gal | 1 pt | 1 gal | 3 qt |
| 40' Sailboat | 2.5 gal | 6 qt | 2.5 gal | 2 pt | 1.5 gal | 1 gal |
| 45' Sailboat | 3-3.5 gal | 8 qt | 3 gal | 3 pt | 2 gal | 1+ gal |
| 50' Sportfisher | 4+ gal | 8 qt | 3 gal | 4 pt | 2.5 gal | 1+ gal |
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Another way to determine bottom paint quantity is to estimate the approximate surface of the hull below the waterline, using the following formula:
Length x Beam x 0.75 = Approximate Surface Area sq ft
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