Alkyd paint, sometimes called oil-based paint, uses synthetic resins as its binder and dries to a hard, smooth finish. It stands up well to scuffs and wipes clean easily, so it’s a solid choice for trim, doors, and cabinets.
The trade-off is cleanup and cure time. Alkyds need solvent to clean brushes, and they take longer to dry between coats, so projects using them get scheduled around that. When you want a finish that takes daily wear without showing it, the wait pays for itself.