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post #5 of Old 09-10-2016
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Re: Cetol Natural teak vs one part vs two part varnish

SEMCO (all color versions) is simply a wonderful way to quickly and easily protect bare teak.

Prior to the application of SEMCO, I usually soak with TrisodiumPhosphate to remove the 'grey - UV destroyed surface wood cells', rinse, then bleach with oxalic acid; no sanding needed if you don't object to 'proud' teak grain.
SEMCO is 'wonderful' in sealing and protecting bare teak decks, etc. .... but 'can' begin to transfer and build up on the soles of deck shoes and make them a bit more 'slippery when wet'.

The downside of SEMCO is: if you do a lot of 'ocean sailing' the constant 'green water' on the deck can begin to erode the SEMCO; thus, it requires a smaller time interval for a re-coat. Im contemplating mixing SEMCO with Thompson's WaterSeal as a trial in an attempt to extend the service life of the SEMCO.
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