Yes, TotalBoat Halcyon Water-Based Marine Varnish can generally be applied over water-based stains that have fully cured. Halcyon is compatible with TotalBoat Signature Interior Wood Stain. Because all stains are different, when applying Halcyon over other stains, always test for compatibility and good adhesion before completing the project.

To test adhesion, follow these steps:

• Apply stain and allow it to cure on a sample piece.
• Apply Halcyon varnish as directed, with multiple coats, and let it cure for 48 hours.
• Conduct an adhesion test by creating a cross-hatch pattern with a razor blade on the varnished area.
• Press a piece of duct tape firmly onto the cross-hatched area, wait a minute, then remove it.
• If the tape does not remove any varnish, it indicates compatibility, allowing Halcyon to be safely used over the stain.