Have used "soft" anti-foul paint on fiberglass covered iron keel. Was told this year to use co-polymer Plus paint to keep down sludge build-up. This involes sanding, using a bond primer paint, then at least 2 coats of CCP paint. Should I buckle down and complete thses stages for a reward bigger than using the cheaper "soft" paint? Also, one of the paddles of the spedometer wheel under the hull is broken. Do I remove the entire housing from the hole or can paddle be replaced with super glue? Cam removable electronic devices (depth gauge) be checked at boat stores that also offer repair services?