I picked up some surplus WWII radial engine poppet valves (think late WWII bomber engines... the valves are HUGE). They were in the original packaging, and coated with protective goo. It's a dark ...

If you recall from the previous thread, I picked up a few old radial engine valve poppet valves. They were covered in cosmoline. I have cleaned one. The valve, as obtained. It's... large. The paper on ...