Here are 3 basic points to know to get best results when you hire painter for your home.
Tip 1) use branded Primer
Use primer if branded quality. Asian paints & Nerolac primers are pretty common in Indian homes. Dot let your painter use low quality primers.
Primer is chemical that your wall needs to be treated with before painting.
As per Wikipedia
“A primer or undercoat is a preparatory coating put on materials before painting. Priming ensures better adhesion of paint to the surface, increases paint durability, and provides additional protection for the material being painted.”