Endgrain.":25o1iolq said:
Here is the bench which has the mildew. I cleaned it off and it is ok to use but not quite the looker it usd to be.
Still looks good but I know what you mean. Unless you can skim with a plane or sand off the equivalent amount the wood often won't look its best any more after it has had mould on it.
Endgrain.":25o1iolq said:
Initially there were 3 coats of Danish on it but that did not help.
The Danish oil might have been part of the cause actually, many are made with linseed oil and this is known to encourage fungal growth which is why old woodies kept in the dark can often go mouldy.
Endgrain.":25o1iolq said:
It needs to be weather proof as It is often outside in a shower.
Varnish is your best bet then if you want to maximise water resistance, at least in terms of a finish you can wipe on. Danish oil is an oil+varnish mix, heavily diluted, but straight varnish will deposit much more resin and build a solid film.
Some would go with a spar varnish for this but nearly any varnish should do the job quite well, even cheaper varnishes which don't identify their ingredient (probably straight alkyd varnish) are quite waterproof once you've built a proper coat. I finished a utility knife handle with that kind of generic varnish last year and even with exposed end grain at both ends it is holding up fine to washing in hot soapy water, so the occasional rain shower shouldn't phase it