Where the
world gathers for metal finishing
Q&As since 1989


-----

Aluminum Sailboat Mast Refinishing

I have a 55' black anodized sailboat mast which is badly faded and blotched by the sun. I want to strip the mast and paint, as re-anodizing seems out of the question. Any suggestions, such as caustic soda [affil links] , or EZ-off as opposed to sanding or blasting? Any alternatives to painting?

Richard Messerman
- Cleveland, Ohio
 

Since tall masts are subjected to huge stresses from constant motion, unseen internal corrosion and subsequent structural weakening is always a distinct possibility, esp if the boat has ever sailed in salt water. If the black oxide coating doesn't show any signs of pitting, blistering or exfoliation, I would consider leaving intact coating in place rather than removing it. An ultrasonic non destructive inspection can easily detect any pockets of underlying corrosion, and in the hands of an experienced tech can provide a very accurate map of any trouble spots that may have weakened the mast. Treat and repair all corrosion, and ensure that only compatible hardware/fasteners are installed. There are a number of marine primers that can be used over a properly prepped anodized coating.

Mark Chilers
- Chesapeake, Virginia
 

---

I am purchasing a 44 Swan sailboat. The 58-foot mast has peeling paint along the slot and need refinishing. I plan to pull and restep the mast. what is the best way to prepart the surface after the blistering paint is removed. Also what is the best finish for a mast this tall. The boat is in Seattle so it will see plenty of salt water.

Tnanks. Ken

Ken Jablonski
consultant and user - Seattle WA USA
2007