Can TotalBoat Halcyon be applied over Sikkens Cetol? Eric Boudreau May 28, 2021 13:13 Updated TotalBoat Halcyon varnish should not be applied directly over Sikkens Cetol. Cetol should be removed prior to applying Halcyon. Related articles What products can be used as a solvent wipe after sanding TotalBoat Halcyon varnish? How often does TotalBoat Halcyon require maintenance coats for exterior applications? Can a spar varnish be applied over TotalBoat Danish Teak Sealer? Can TotalBoat Lust be applied directly over TotalBoat Marine Wood Finish? Can TotalBoat Gleam 2.0 varnish be applied to brass? Comments 0 comments Please sign in to leave a comment.