Oil-based paint is more durable, but it takes longer to dry, and cleanup requires turpentine or paint thinner (mineral spirits). Oil-based paints are made with either alkyd (synthetic) or linseed (natural) oils. Alkyd paint is more common because it is less expensive and tougher. Oil-based paint is good for trim work because trim takes more abuse over time than do walls. Regulations on disposal of leftover paint vary by location. Some states and municipalities require leftover paint to be taken to an approved drop-off location, while others will allow latex or water-based paint to be solidified and thrown out with the household trash. However, some household waste haulers may not pick-up latex paint even if solidified. Always check with your local authorities and your local waste disposal service provider on rules and regulations applicable to your area.