I am in a similar position, I have started on the underside with Bilthamber Dynax UC on the metal work but, have used Dekaphon 9735 on the rear inner wheel arch panels and the underside of the floor boards as it appears designed for the job. I have used ACF 50 on boats before but will use 3 in 1 on the wing beading. Will probably do the top of the floor boards and other less exposed plywood with Deks in due course.
