Another mast question

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Manny

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Oct 5, 2006
983
Hunter 82? 37 Cutter Wherever the wind takes me
Now that my mast is horizontal, I get to see how neglected it looks. It's a Kenyon mast and has an off white paint on it which is scratched and worn in a lot of places. Could I sand this off and polish it? Would that hurt the aluminum if it is anodized? Or Could I repaint it with some sort of aluminum paint? Manny
 
M

Margaritaville

Why Paint?

after it is sand blasted, get a real smooth sanding disc and remove the swirls and then a polishing disk. My mast is bare and it looks great. in florida we worry about bare metal.
 
Jan 1, 2006
7,984
Slickcraft 26 Sailfish
I've painted two masts

the first was previously painted but dinged up. I sanded it without any effort to remove all the paint -just to make a smooth adherent surface. I used Interlux one part epoxy with very good results. I don't remember what I did with any bare metal although I don't think there was very much. The second was bare aluminum with a mostly weathered off lacquer finish. I sanded it all off, used the chromium primer, I think another primer and two part epoxy. It held up well and looked so much better. Both were done outside in the winter on L.I. A nice diversion over the winter
 
May 24, 2004
125
Ericson E-23 Smith Mt. Lake
Keeping the bare metal look

Lots of masts that were originally anodized have experienced enough chafe and wear in numerous locations so that now they look pretty ragged. Of course one solution is to sand and paint, but I wonder if there isn't some sort of industrial "clear coat" that would allow the mast to retain the original bare metal look. I know that most clear coats are not too durable and are generally unsuitable, but does anyone know of one that is?
 
T

tom h

I made aluminum tanks

There is a reason the Navy is and has moved to aluminum boats. Without paint. Anodizing is applying acid to the aluminum and waiting till it forms a "crast" ont he surface. You then just wash it off with water and are good to go. On a Virgin tank, there was no problem in getting the tank to look uniform in color and texture. But whenthe tanks was sanded or worked on, it was nearly impossible to make good. Yes, you can still anodize it, but you can't get a uniform look no matter how hard you tried. As for Forida, my guess would be the main problems are a chemical reaction between the metals. There is a lot of stainless on an aluminum mast, all just begging for electrolosis. Paint secures the parts from the weather and so provides a barrier that limits this problem, hence, painted masts in the South.
 
S

Scott

Personally Manny, I like the painted look ...

My Kenyon mast and boom were painted black and in bad need of re-finishing. Last winter I did the boom and now I have the mast down to do this winter. When I did the boom, I started by sanding all the black paint off to bare metal. I did like how clean and shiny it looked, but I like the snow white paint that I put on much more. I used a clean metal primer that I got at the hardware store, then Interlux primer for polyurethane and Interlux Perfection in Snow White. I figured that if I was going to paint it white, I may as well go with the whitest white that they make (they have about 6 selections of white). These Interlux systems are a 2-part primer and a 2-part polyurethane finish and they are EXPENSIVE! There are other single part alternatives that are easier to use and maybe far less expensive. You'll have to make up your own mind about that! I think they were about $65 each for a quart. I bought them from a local marine supplier in South Amboy. Get this ... they were charging an additional $20 more for the Snow White Perfection than the other "white" selections. I struggled with this decision for a few minutes before going ahead. Several weeks later, when this store didn't have something I was looking for, I went into the West Marine store which was literally right next door. I was curious about their price for the paints that I had already bought and opened and found that they were selling Perfection for the same price, except that the Snow White didn't have the upgrade premium that I paid at the other store *grr ! It pays to look around a little bit first ... If you paint your mast the right way, you won't be sorry. I do have a few questions for you experts. The store I bought the Interlux from said I should use zinc chromate to prime the bare metal for best results. They didn't have it and said just go to any hardware store. Since nothing is as simple as it sounds, I went to a Home Depot and another hardware store and couldn't find any bare metal primers that used the words "zinc chromate" on the label. I also got blank looks from the "experts" in these stores when I asked for "zinc chromate primer". The best I could come up with at the second store was the Rust-Oleum Clean Metal Primer where the label says it should be used where the finishing paint is Rust-Oleum Enamel. Is this appropriate or did I make a mistake? I couldn't be happier with the finish that I got. After one season with the boom painted, I had only a few tiny chips in the sail track where the outhaul shackle attaches to the clew and I had some very minor abrasion were the reefing lines chafe on the boom. I figured this is normal and that the results were very good overall. The other questions ... I started out by sanding with 60 git and progressing to 220 grit to get a very nice smooth and shiny surface on the boom. It occured to me that when priming the metal, it may be better to leave the roughed up surface from the 60 grit for better adherence. I cleaned with acetone before priming. When I do the mast, what will give the best results? I definitely have enough Interlux Primer and probably enough Perfection left from last year to do my mast this winter. The cans were sealed after opening last March, but can I expect to use the leftover paint, or should I start fresh again (and throw out the very expensive paint that I have left over)?
 
Sep 21, 2005
297
Catalina 22 Henderson Bay, NY
What would happen

What would happen if you just sand your mast and did nothing else? Would the "new" finish hold up, or would it oxidize and look bad? My mast could use a little work as most could. Thanks Dale
 
R

Richard Lanier

Zink Chromate Primer

I am looking at a quart can of Petit Marine Paint Quick Dry Zink Chromate Primer 6462. It says,” is designed to prime underwater metals before applying anti-fouling paint." It says to apply Pettit Metal Primer 6455 first, then Zink Chromate Primer 6462. I am told that it is used on aluminum motor out drives. It is yellow in color, but I have also seen spray cans in green. I think I bought it at West Marine, but it might have been Fawcett’s in Annapolis. Boat US stores sell it in spray cans. I am told that it is a "Professional" primer that most places do not carry. When I asked for it at Home Depot, they could not find it. I hope this is helpful.
 
May 24, 2004
125
Ericson E-23 Smith Mt. Lake
Two tricks

When opening a new can of paint, if you punch small holes in three spots 120 degrees apart in the bottom of the "channel" in the rim of the can, paint that spills into the channel will drip back down inside the can and the channel will be easy to wipe clean with a rag or paper towel. Also, once the lid has been put back on the can, store the can upside down. Any "skin" that forms on the wet paint inside will then be on the bottom when you turn it right side up next year. And, yes, sanded unpainted aluminum will turn dark after a while.
 

Manny

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Oct 5, 2006
983
Hunter 82? 37 Cutter Wherever the wind takes me
Thanks all!

Thanks to all for the responses!!! I'm not sure what I'm going to do but at least I have little time to think it over. By the way, how cheesy would it look if a mast was painted with the fake wood paint to make it look wooden? I used it once on a mantle in my old house an it actually looked okay. Any thoughts? Manny
 
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