There are two types: oil-based paint (known for its sheen) and water-based paint. Nowadays there’s no need to use oil-based when painting a room. Modern water-based options, which dry faster and have less odor, offer plenty of gloss and wipeability. As for paint finishes, you can’t fail with a matte or eggshell finish on walls and a satin finish on trim. When purchasing paint, be sure to stick with brand names. Bargain paints can yield disappointing results.