Can I apply TotalBoat Gleam 2.0 spar varnish to a brass surface? Annette DiOrio August 16, 2021 14:09 Updated Yes, you can apply TotalBoat Gleam 2.0 varnish to brass to protect the surface, but typically, lacquer is used to protect bare metal. Related articles Is it OK to apply TotalBoat Gleam 2.0 varnish on top of Minwax® stain? What are the best conditions for applying varnish? For an exterior application, how often do I need to reapply TotalBoat Halcyon varnish to maintain the coating? How do I prepare a cured epoxy surface for an application of varnish or urethane? Can I apply TotalBoat Halcyon varnish over Sikkens Cetol marine finish? Comments 0 comments Please sign in to leave a comment.