TotalBoat Gleam varnish can be applied over latex paint for certain applications, however, there are a few things to consider before doing so. The painted surface should be completely cured for a few days (under normal curing conditions), it must be cleaned to remove any surface contaminants such as dust, dirt, oil, grease, water, or waxes, then sand the surface and remove sanding residue before applying Gleam. Any spar varnish such as Gleam will impart an amber color over the paint, and being a much harder material, it may lead to easier delamination from stresses or impact.