PALETTE CLEANSING!
Wooden palettes need extra care, otherwise oil paint in particular can stain them. Begin a thorough clean by scraping off all pigment with a palette knife. Wipe off acrylic residue with a sponge and water; for oil residue, apply a light coat of solvent and let that sit for a few minutes before wiping. Once clean, recondition by applying a light coat of linseed oil and rubbing it into the grain with a paper towel. For best results, allow linseed oil to dry for a day.