Satin over Satin
#1

Do I need to prep the walls in anyway to re-paint my kitchen walls?
I painted them about 3 weeks ago with a Behr Satin. The texture is great, but the color sucks! I know, I know, I should have bought a quart and tried it first.
I now have a different color, and it's a bit darker. I tested it in a few (1 inch square) areas and it covers well. It is NOT Behr, but a good quality anyway.
Should I scuff the walls to help the paint grab? Or can I just go ahead and paint the walls as if this were a third and fourth coat?
edited to say: Thanks for any/all advice!!
I painted them about 3 weeks ago with a Behr Satin. The texture is great, but the color sucks! I know, I know, I should have bought a quart and tried it first.
I now have a different color, and it's a bit darker. I tested it in a few (1 inch square) areas and it covers well. It is NOT Behr, but a good quality anyway.
Should I scuff the walls to help the paint grab? Or can I just go ahead and paint the walls as if this were a third and fourth coat?
edited to say: Thanks for any/all advice!!