I recently acquired a pair or RB K-horns, the former owner had no use for them and put up an ad for a free set of large speakers, I couldn't resist and they were real. They've darkened over time and may have been oiled in the past but they haven't had any care in a long time. What's best to use on these, Danish oil? a feed and wax, or just wax? I originally wanted to veneer them but I like the unfinished look for now.