What is the finished difference between Helmsman Spar Urethane and General Arm-R-Seal oil based? Both satin. Reason why I ask....doing some outdoor kitchen cabinets, and I'm not happy with the Helmsman stuff. I'm not proposing to overcoat what I've already done with the Arm-r, just wondering how different two pieces will look next to each other if each finished with different finish. Reclaimed barn oak, no sanding sealer, 2 coats of BLO already rubbed in and well dried. I'm not making museum furniture, and can tolerate a slight difference in hue/amber/sheen as long as I'm the only one that can tell because I know it's there, or, is the difference going to literally be "black and white"? I'm sure there are other differences to consider, the fact that this will be in a covered space, exposure to sun/weather, but all I'm interested in is how different the two finishes look when dried and cured for a while.