raw linseed oil on teak dark spots?

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njl

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May 30, 2011
64
Westsail 32 NYC
I'm noticing that my oiled teak has dark spots in certain areas. It's raw linseed oil rubbed on every two weeks, this is my 3rd coat. The attached pic is not the greatest picture, but kind of shows what it looks like.

It seems to be mainly in places where the sun is directly hitting. Would that be the oil carbonizing? Any experience with this?
 

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woodster

woodster

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Sep 15, 2009
6,244
S2 9.2a Fairhope Al
did you start from raw teak when you started putting on the l seed oil ...if yes did you claen the teak with some sort of bleach in order to get it good and clean...and just out of couriosity why are you useing linseed oil and not teak oil...
 
Ross

Ross

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Jun 15, 2004
14,693
Islander/Wayfairer 30 sail number 25 Perryville,Md.
Do you expect raw linseed oil to harden in this decade? Boiled linseed oil, pine tar, turpentine and japan driers is the New England workboat deak treatment. I don't know anyong that would use raw linseed oil. But for what it is worth it can grow a nice crop of black mold.
 
RichH

RichH

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Feb 14, 2005
4,773
Tayana 37 cutter; I20/M20 SCOWS Worton Creek, MD
Agree with Ross, plus 'very slow curing' raw linseed oil is prone to be a nutrient source for fungals.
If you want a good (seasonal) exterior oil finish, use 3/4 part tung oil + 1/4 part (or more) oil based varnish, apply thick and dont wipe it off, several thick coats. If you want a deep gloss add several more coats, let cure, flat sand and polish. You can 'hand rub' with rottenstone & water to quickly attain an equivalent of a primo varnish job. Will turn 'dark' in about 2 years. Easy to remove by soaking with TSP.
Is called: 'resinated' oil finish.
A commercial premixed product is "NuTeak" by MaryKate.
 
N

njl

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May 30, 2011
64
Westsail 32 NYC
Ross said:
Do you expect raw linseed oil to harden in this decade? Boiled linseed oil, pine tar, turpentine and japan driers is the New England workboat deak treatment. I don't know anyong that would use raw linseed oil. But for what it is worth it can grow a nice crop of black mold.
Click to expand
Well now you know someone... What can I say, I've used it in painting and it dries after a few weeks. But it sounds like I'm growing some mold on it. Time to end experiment.

Thanks for the replies. (First boat, I'm learning as I go.)
 
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