Painting Steel

Preparation of steel above the waterline


Make sure the steel surface is dry and remove all dirt, wax and other contamination.

Rust removal and sanding

The steel surface must be cleaned of rust and mill scale, preferably by sandblasting to SA 2.5. If sandblasting is not possible,

sand the entire surface manually or by machine using 60-80 dry abrasive paper. All welding spots/ drops must be removed and sharp edges must be rounded with a grinder. Areas where rust removal is difficult should be prepared with a dependable rust remover.

After cleaning, removing rust and sanding, apply the first (thinned) primer coat as soon as possible to ensure the least amount of renewed oxidation. The temperature of the (bare) steel must at least be 6°F./3°C. above the dew point.


Above the waterline, fill irregularities with Epifanes Epoxy Filler. After the filler has dried, sand with 220 dry and apply the first thinned primer coat.


One-component paint system on steel

  Step 1   Step 2  
  Epifanes Multi Marine Primer Epifanes Mono-urethane Yacht Paint
Number of coats 3   3  
Thinner 5-10%   0-5%  
Drying Time 18 hours   24 hours  
Abrasive Papaer 220 - dry   400 - wet    
Remarks Thin first coat by 25% and apply with a stiff brush.  If needed, fill between coats with Epifanes Combi Filler (max. 1 mm).   Thin first coat by 5 - 10%  


Two-component paint system on steel

  Step 1   Step 2  
  Epifanes Epoxy Primer Epifanes Poly-urethane Yacht Coating
Number of coats 1   3  
Thinner 25%   0-5%  
Drying Time 12 hours   24 hours  
Abrasive paper 180 - 220 - dry   400 - wet  
Remarks Thin first coat by 25% and apply with a stiff brush.  If needed, fill with Epifanes Epoxy Filler..   Thin first coat by 5-10%.
Recoat within 48 hours without sanding.
After 48 hours always sand.

Maintenance of previously painted steel

In order to keep a paint system in good condition, apply one or more maintenance coats periodically.

If the existing paint is still intact and only shows discoloration or loss of gloss, degrease with Epifanes Spraythinner for Paint & Varnish. Then sand and apply one or more maintenance coats. Lifting and/or damaged paint must be removed completely and replaced by a new paint system including primer coats.

One-component Epifanes Yacht Paints can be applied on almost all existing paint systems regardless of brand. Epifanes Poly-urethane Yacht Coating can be applied on existing polyurethane or epoxy based systems regardless of brand.