Frank’s picture makes me think I need some oil for mine!
Only looks that way just after finishing and before using. Multiple coats of wet sanded poly urethane sealer on top of the stain! The regular patina shows up quickly with repeated use. Over time the multiple coat process stands up very well. The group of tops I made for Boon's workshop in 2011 are standing up very well with aged patina well in place. I believe the extra time and effort is well worth it in the end result. Depending on the porosity of the grain in the wood I would apply 10 to 12 separate coats with wet sanding between coats. He has found that a rubber matt top is useful for certain circumstances and rectangular tops can also be useful. Thicker tops allow for tie down securing points underneath for special circumstances.
Some friends keep them outside year round, large garbage bag over the top for rain and snow. Plus metal parts painted with Tremclad and the hydraulic piston maintained with a light coat of oil from time to time. I do recommend they be kept under cover and that the tops be thicker and solid wood. Not a fan of using plywood or MDF.
Prefer red or yellow cedar, 2 inch thick tops. this wood has great strength, lighter in weight and natural moisture resistance.
The heavier " barber style bases" have stronger metal components and better stability for long term use. For lighter use the " salon style" are easier to move around and friendlier to use in house. The trick to moving the heavier units around is to tip them on the side of the base and roll away. Best on concrete or heavy duty flooring such as garage or workshop. They are no fun to lift and carry!