To paint a large section without leaving lap marks, roll the nearly dry roller in different directions along the dry edge, feathering out the paint as you go. After completing the entire length of the wall or ceiling, move to the next section and paint over the feathered edges. For the second coat, apply the paint in the opposite direction. This crisscrossing paint application sharply reduces (if not eliminates) lap marks.
Getting multiple bids is even more important in the state of Georgia, since contractors of any sort are not required to obtain licensing in order to operate. That makes hiring a painter in the Peach State a bit of a crapshoot, since anybody with a ladder and a paint brush can claim to be professional-grade painter, whether they've got the experience not. This is also why it's not just important to collect multiple bids, but to ask for references and follow up on them. Talking to former customers about their experiences is the best way to go if you want to be absolutely sure you're going to get a quality paint job and with a great price.
This article with comments was terrific - it was so informative. I found the advice useful. It addressed specifics like the condition of the dry wall surfaces, any additional repairs such. pin holes, chalking, smoothing of wall surfaces, absorption of paint and number of coats that may be needed. It should also include insurance coverage, and reflect the clean-up afterwards. Having a written contract with the company's letterhead is a must.
Thorough preparation is essential to ensure a good finish. Contractors might have to fill cracks or holes and remove old paint if it is badly worn, peeling or flaking. They remove all paint and apply a suitable primer to the bare surface. If the existing paint is in reasonable condition, they clean it and rub it with abrasive material to provide a key for the new paint. On new surfaces, such as bare wood or fresh plaster, they apply a suitable seal, followed by a primer coat.