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All About Guns What's your weapon of choice, and why? Discuss the beloved speargun here!

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Old 12-28-2012, 02:51 PM   #1
memosub
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Mahogany finish

hi, last week i bougth a lot of very old mahogany, maybe 100 years old from the roof of a old hause, i think i go tranform that in some spearguns, whish is the best finish for mahogany, polyurethane, epoxy or oil? thanks for your help
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Old 12-28-2012, 03:24 PM   #2
LunkerBuster
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Re: Mahogany finish

Sounds like cool wood. I believe you can oil mahogany but most would recommend an epoxy finish. At least a penetrating epoxy to seal the outside well
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Old 12-28-2012, 04:30 PM   #3
nigelr
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Re: Mahogany finish

Sounds like fantastic timber, very satisfying to rebirth into spearguns! Must admit to being jealous, I love recycling old timber!
My choice of finish would be either epoxy or 2-pack marine polyurathane.
Epoxy is considerably more user-friendly in my experience, the fumes from marine poly are very dangerous IMHO. Poly does give a tough clear finish, but epoxy is easier to re-coat.
I recall a while back someone discussing auto clear-coat; would like to know more about this as it is a pretty durable finish also I believe.
Cheers.
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Old 12-28-2012, 04:35 PM   #4
johndoelman
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Re: Mahogany finish

oil should be fine i have oiled mahogany before. Anyways it held up for the last 100 years right
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Old 12-28-2012, 05:17 PM   #5
Behslayer
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Re: Mahogany finish

I've done a few guns using similar finds.. Old Teak Beams from a Palace in Indonesia. In retrospect I would have Epoxied all of them. That wood is so nice when it's aged like that. Might as well use Epoxy and get a great look at the grain.
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Old 12-28-2012, 06:19 PM   #6
xpuddlepirate
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Re: Mahogany finish

Memo, looks like you will have enough to do a variety of finishes. I do like the way epoxy makes mahogony look.
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Old 12-28-2012, 06:46 PM   #7
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Re: Mahogany finish

My understanding is that there is mahogany and mahogany, so you never know the exact details of what you have unless you can see it.

When I lived in Darwin (tropical Australia) there was a lot of mahogany around. People planted trees in gardens which grew to massive sizes (the trees, that is, not the gardens). When they were felled, they made their way into the timber market.

Anyway, as I recollect, the timber I saw seemed porous. If that is the case with your mahogany, I recomend two pack polyurethane. Floor varnish is OK. Leave the gun in the sun before laying on the first (thinned) coat, and then bring it into the shade. The air in the pores will contract, sucking the varnish into the surface of the timber, making a robust finish.

If you do it the other way around, the air will expand and force tiny bubbles into the surface of the varnish, making you sand and recoat more often.

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