[CA] [CA11] Anti fouling on RV-220

[morowsky]

First some background:
Last year I had a set of RV-220 (bronze pack, T70319), along with other electronics, installed. Per the instructions in the installation manual, I brush painted the transducers (both the bronze housing and the black "working" parts with 2 coats of a red, water based, ablative, anti-fouling paint (Interlux Micron WA). The color would allow me to see when the paint wore off. No primer or special prep was used

The boat was hauled this past fall and the yard pressure washed the bottom of the boat before putting it on the stands. The transducers still have some paint on them, both on the bronze and the black parts, while other parts of them are bare.

Where paint remains, there is no fouling.

Where no paint remains (both on the bronze and black parts, parts are very clean, but there are a few spots where groups of pin head sized white growths have formed (baby barnacles?).

It is possible that the places where there was no pant and no growth, that the remaining paint was washed off by the pressure washer during haul-out.

Questions:
1. Was the Micron WA an appropriate paint to use?
2. Should/could I use a special metal anti fouling paint on the bronze parts? (e.g. VELOX+)
3. Is there any special prep needed on the black parts prior to applying the anti-fouling?
4. Though not mention in the instructions, an FAQ mentions that copper based anti fouling should not be used. I could not find any info on the Micron WA data sheet about copper content, though it does mention 36% solids . Please comment about the copper concerns.
5. Do I just need more coats of paint (3 or 4 total)?
6. OK to use green Scotch Brite to clean up the white spots?

Put 100 hours on the boat last year. Cruising speed 18-20 knots, top speed 30 knots. Water temp max 85 but generally below 80. Docked in salt water (Long Island Sound, CT). Boat is in from early May thru the end of October.

Sorry for the book. Wanted to give you as much info as possible.'

Thanks
Steve.