I have effected a small repair job to the rudder blade and I'm ready to finish the job. I need to get some antifoul on there but am unsure what to use as a primer / undercoat. This https://www.burnsco.co.nz/shop/boating/paint-maintenance/primer-undercoat/altex-multipurpose-primer-undercoat looks like it might be just the ticket. But then again, it might be absolutely the wrong ticket. I used West System Epoxy if that makes a difference. Hope that's not too vague a question.