For info.
Last winter i added copperbot to my bilge sump, and the outboard motor well, so as to combat the slime when boat is left on mooring afloat.
That seems to have worked well, however it's not asthetically pleasing! But then nor was the slime?
As something of an experiment, I used up the "left over" mix on the lamnellae flaps.
Followed all prep guides, afap.
This has not worked at all, hardly any coating now remains attached.
TBH, I'm neither surprised nor disappointed.
Lots of small barnacles where it has flaked off, in some cases only 1cm or so from intact coating.
Summary: A waste of time.