This is a question that many people ask and here is the answer.
If your drywall repair has a large area to match or if you want a perfect job you can re-texture the entire wall ( that depends on the experience of drywaller). If it's been a while since the wall was painted it should be prepared as you would for painting. The reason for that is to have a clean area of work and to make sure that the over spray is equal through the area that is worked on. So that when you paint the repair after it dries you can also paint the entire wall to have a more even finish. This is recommended for older houses that have old paint.
If you are in the San Diego are and need Drywall repairs or texturing you can contact us at www.RoenConstruction.com .