My Humber destroyer is afloat all season. For the last ten years I've used International antifoulings. At first Uno on both hull and tubes. Now use Trilux 33 on the hull because the white is really white. This year used Trilux on the tubes too (navy blue) as I finally ran out of Uno.
I rarely do more than 26 knots and both Uno and Trilux seem to survive that. On balance I think Trilux is marginally better at keeping the hull and tubes clean. Also doesn't build up as thick a layer as Uno.
This year I scraped the hull back to gel coat for the first time as the layers of a/f were getting a bit rough. Not quite so easy getting it all off the tubes so they're still a little lumpy, but not too bad really.
For the outboard bracket and trim cylinders etc. and o/b gearbox, all of which are submerged at rest, I use that transparent spray on a/f from TK. It's safe on aluminium as it hasn't any copper in it and it lasts well for four months (like it says on the tin). However, at the end of the season I have a forest on the o/b bits.
Hope that helps.