The warranty may be the most important part of comparing painters. The warranty should cover workmanship as well as paint. If paint peels or fades, it’s important that a painter is going to stand by their work for a certain number of years. If they don’t stand by how they applied the paint, there’s no sure way to know that the paint will even look good.
A good thing to remember with warranties is to ask who is backing this up. If it is only the painting contractor, look to see how many years they’ve been around to estimate if they will be around in the future should you need them to come back and provide as promised.