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History of sailing
Time to start
Looking for a designer
Choosing the material
Shed or no shed?
Concrete pads
Placing the order
Tracking the container
Overhead gantry
Assembling the jig
Bottom plates
Welding the frames
Installing Keel
Interior finishing
Tools & equipment
Contact me Email


In preparation for painting

I have been doing some research on painting systems. I used MPI as a source for the results below. Some paints could be verified using search function on various boat building forums such as Paints & Coatings of MBS.

MPI #DescTop coatsSurface Prep SSPCApplicationCloverdale/Sherwin-Williams/Sigma
18 - Zinc Rich Organic A solvent based, one component for marine environment suitable for immersion Not specified SP-5 (white metal) Airless and spray, but brushes or rollers may be used for small work or touch-up ClovaZinc 1/Zinc Clad V/NA
19 - Zinc Rich Inorganic For severe marine environment MPI #77, 98, 108. #98 or 108 is recommended as an intermediate coat for #72 finish for longivity for exterior surfaces SP-5 (white metal) Airless and spray, but brushes or rollers may be used for small work or touch-up ClovaZinc 2/ Zinc Clad II Ethyl Silicate/ Silguard SC
20 - Zinc Rich Epoxy Solvent-based, 2-3 component epoxy for moderate exposure in marine environment MPI #77, 98, 108 SP-6 Commercial blast min, hand or power tools is acceptable sometimes Airless and spray, but brushes or rollers may be used for small work or touch-up ClovaZinc 3/Zinc Clad IV/Simgarite Zinc Primer
101 - Anti-corrosive Epoxy A solvent based, two component, epoxy - polyamide type, for exterior and interior, ferrous and galvanized metal surfaces MPI #77, 98, 108 Not specified Application methods will include using brushes, rollers, and airless and conventional spray ClovaPrime 21 Epoxy/ Duraplate 235 Multi-Purpose Epoxy/NA
Top or Intermediate Coats
MPI #DescPrimerApplicationCloverdale/Sherwin-Williams/Sigma
72 - Two-Component Pigmented Polyurethane, Gloss A solvent based, two component polyurethane, pigmented coating with a gloss finish... for metal surfaces where abrasion, weathering, chemical and solvent resistance is required MPI #19 Primarily applied by spray, but can be applied by brush or roller in small areas ClovaThane 834 Series/NA/NA
77 - Epoxy, Gloss A solvent based, two component, epoxy/polyamide coating for heavy traffic in moderate industrial environments. Must be resistant to incidental splash and spillage of dilute (5%) sulfuric acid, (15%) hydrochloric acid, (20%) sodium hydroxide, gasoline and heavy duty cleaners and detergents MPI #19, 20 101 Application is generally by spray, but in areas where spray is impractical, a brush or roller may be used. Temperature: 15 - 40° C, max rel. humidity 80% NA/Tile-Clad HS Epoxy/NA
98 - High Build Epoxy, Gloss A solvent based, two component epoxy for protection to exterior/interior steel surfaces in marine environments. Used as an intermediate coat for MPI #72 MPI #20, 101 Primary application is airless or conventional spray, but small areas can be touched up by brush ClovaCoat 300, ClovaMastic/ SherTile HS Epoxy, B67-200 Series/ NA
108 - High Build Epoxy, Low Gloss A two component epoxy, high solids coating for use on interior or exterior primed metal surfaces. For increased durability, this product may be top coated with epoxy or polyurethane enamels. MPI #19, 20 , 101 Not specified ClovaGuard/ Macropoxy 646 Fast Cure Epoxy/ Sigma Multimastic

It appears that organic zinc rich primers are most suitable for the interior. Particularly ClovaZinc 1. As a single component, it is ready to be used. It can be applied over other zinc rich coatings or to cleaned to SP-6 or SP-10 metals. It touch dries in 10-15 minutes and hard dries in 12 hours. Min time for overcoat is 1 hour, normal 8 and max is indefinite. Application temperature should be above 7° C. It has excelent moisture, weather, oil, salt and fresh water resistance. If immersion or strong chemical resistance is required, then it should be top-coated with high performance coatings, which may be applicable to bilge area.