Antifouling Rudders?

[PeterBoater]

The boatyard at my home marina routinely applies antifouling to rudders and P-brackets, including on my boat with no apparent ill effects. However, recently visiting another marina (owned by the same company), I saw a boat with rudders and brackets heavily encrusted with barnacles and no antifouling applied. I was told that because of an interaction between the copper antifouling and the bronze sterngear, one should never antifoul sterngear. Which is correct?

 

[pvb]

Which is correct?

Your home marina.

 

[Tranona]

No logic to that. No reason why you should not antifoul stern gear except that it is difficult to get it to stick to props in particular. Don't understand the comment on rudder. Most are GRP or wood so no problem painting them. Some are steel or maybe bronze on some older power boats, but again no reason why they should not be painted.