Protecting non-native wood outdoors
We brought an antique table made in Eastern Canada to Australia with us. I think it might be walnut. It spent several years in British Columbia, a damp climate, but it was indoors in the usual heated environment which amounts to a dry climate. Now we have it on a covered verandah in SE Queensland where the climate can be hot and dry or quite humid. The top is composed of boards about 3" wide. It only gets a bit of morning sun then is in shade for the rest of the day. I want to finish it with a finish that will protect it from sunlight, humidity, and periods of hot dry weather, marks from drink glasses and the occasional water drops if a storm blows rain sideways onto the verandah. It will never be drenched. I also want to preserve the look of the wood and don't want to encase it in shiny, bombproof finish. A satin finish would be ideal. I found a recipe on the 'net for a mixture of spar varnish, mineral spirits and linseed oil and wonder what you'd think of that. I also found an ad for hard shellac but from what I read here it's not for amateurs.
It has had three years in a shed to acclimatise to the weather here. I know I have to finish the underside as well to protect it from warping. I'm reluctant to just ask at a supplier until I know more about it as they usually promote what they carry.
I've used Feast & Watson's Satinproof before, cut and polished with steel wool and beeswax but in an interior application and not on a table surface.
I 'd like a product that will handle UV and protect the table from drink rings and food stains. I'd never put anything hot on it. Look forward to help with this question, thanks.