Drive-In Boatwash ...

[mjcoon]

Should be fine.
Copper is good for other things too. Do you greet slugs in your kitchen at night ?
Gardening programme suggests some 1/2" copper pipe at foot of outside door works fine.
Something to do with electrical conductivity . They don't like it you know !

Not sure how it could be due to conductivity. I doubt whether anyone is going to try gold as an alternative which would not have the toxicity of copper but have superior conductivity!

I put a moisture detector in my mother's kitchen after an episode of water damage from a leak. Unfortunately a slug found its way in and set the alarm off. By that time of course my mother had forgotten about the detector and had to pay £50 call-out fee to someone to come and sort it out. So I got no thanks for that...

 

[Tomaret]

The problem, as mentioned many times on these forums , is if the "wash" is too aggressive, the precious antifoul is eroded and future fouling will become worse than ever.

I think that the text envisages no anti fouling - just a monthly scrub of the “naked” hull. I’m not sure that it would work in Portsmouth Harbour!

 

[LONG_KEELER]

I think that the text envisages no anti fouling - just a monthly scrub of the “naked” hull. I’m not sure that it would work in Portsmouth Harbour!

Interesting.

As mentioned above, could still work if using hard antifouling.

I have used hard antifouling for a number of years now combined with a "Scrubis" about
every two weeks during the season. It doesn't take long and it works well for me.