Use Ethyl Lactate as a cleaning solvent to help remove dried All Seasons Primer. We have found that ethyl lactate works better than MEK at removing dried All Seasons primer. Ethyl Lactate also has the following benefits. 100% biodegradable. It breaks down into carbon dioxide and water. Renewable. It is made from corn and other carbohydrates. High solvency power for resins and polymers. Rinses easily with water. Non-corrosive. Non-carcinogenic. Non-ozone depleting. No global warming compounds. Evaporates slowly. High boiling point. NOT a petrochemical. Ethyl lactate will remove silicone oils and greases, machining coolants, tapping oils (sulfur-based), lithium grease, layout inks, and fingerprints.