....Would any of you care to comment on the pros and cons of a 50/50 mix of tung oil and marine spar varnish for a sanded in finish?....
If it's from a trusted source, why not.
My thought would be, to be particularly careful to follow brand recommendations. I don't think there is just one formulation of spar varnish and most tung oils are chemical modifications themselves into resins. I don't think the different ingredients in finishes stay separate, but probably react chemically to become something else. Generically, I'd suspect most any commercial wood oil finish that hardens is probably a 'varnish'.
Because I probably don't have the experience a lot of you folks have, my preference is to thin a favored finish with whatever the manufacturer recommends for cleanup. It may take longer, more layers, to lay down, but it helps me tone down some finishing problems that say, bubba was here. I don't mind mind argument or disagreement about it, it's only opinion.
Alrighty, does anyone have a thought about a thin wood sealer? What I'd like to try to do is lessen how checkering might look darker with the same finish as the rest of a stock.