Hey Tom,
I'm currently hauled at Harbortown. Let the marina do the scraping when they power wash. They will normally do it for no charge or a nominal fee unless there is excessive growth. It's harder to get them off after they simmer in the heat for a while. I ran into some unexpected problems so keep your timeline flexible if you can.
My normal work list:
Bottom Paint
Disassemble and grease through hulls
2 coats of wax on the hull
Varnish rub rail
New zincs on prop and bobstay fitting
I allow about two weeks for just normal stuff since I take frequent breaks to admire my work.
My unexpected work list:
Remove and replace prop shaft
Remove and re-bed stern tube
New shaft (cutlass) bearing
New packing gland hose, clamps and packing
Getting the shaft out required removal of the water lift muffler and the coupling from the reverse gear. Getting the shaft and shaft bearing separated from the coupler and stern tube was quite an ordeal.
I also plan to do the Never Wet on the prop. Since I never got around to experiment with it on the spare prop, I've decided to gather empirical data on the real deal.
Bottom line is, it may take longer than expected.
Werner
And then, of course, there's the dreaded project creep.....