Update: There were some pin hole bumps on the finish after the first coat. I took all the bumps down with 400 grit sand paper til it felt smooth by hand, wiped and applied a second coat. Coming back 8 hours later I still have a couple
The polyurethane feels a little thick and grabby. I put more on than I probably should so that the surface felt "wet out". I have Rambo cooled to about 10C for the first couple hours of curing and then I up the heat to 20 to give the poly urethane a chance to flow out. I haven't got any brush marks but I still have bumpy pin holes. This is probably from over brushing or too thick of a coat. Likely a combination of both.
If you use this finishing method, I would strongly encourage you to thin the first coat of the polyurethane(this will depend on the brand but the helmsman for sure) by 50%. I think the subsequent layers by 25%. You probably will have to do 4 or 5 coats if you thin it but they should dry faster too. I think this thinning step is especially important if you are in a warm environment. It's the holidays and the weekend and tomorrow is another stat so I can't get anything to thin the polyurethane. I think I will keep on with the thick for now. I have three good coats. I think I will sand and do one more in the morning (it is a high traffic area) and maybe on Tuesday I will get some mineral spirits and do a final thin coat after sanding. Alternatively, after 4 or 5 unthinned coats, I might wait 3 or 4 weeks and give it a sand up to 800 grit and a polish to take care of any last bumps.