TotalBoat Halcyon water-based marine varnish is compatible with linseed oil and tung oil. However, it is crucial that the oil is fully dry and polymerized into a solid film that can be sanded before applying Halcyon. The drying process may vary from weeks to months based on the oil type and environmental conditions. Avoid applying Halcyon if the oil remains tacky. It is advisable to wait until the oil has completely polymerized to prevent any adhesion or curing issues. Once dried, sand with 220- or 320-grit sandpaper and apply Halcyon.