Oil-based paints can be difficult to remove once dry, but there are a few ways to dissolve them. The most effective way is to use mineral spirits, also known as paint thinner. Mineral spirits contain chemicals that break down the oil in the paint and allow it to be wiped away easily with a cloth or sponge. Another method is to use an enzyme cleaner like Bio-Kleen Paint Stripper which contains enzymes specifically designed for breaking down oil-based paints quickly and efficiently. If neither of these methods work, you can try using lacquer thinner or acetone on small areas of paint as they will both soften the bonds between molecules in order for it to more easily wipe away. Before trying any chemical solutions on your surfaces make sure you test it first in an inconspicuous area just in case of damage or discoloration.