I am painting steel doors. I have used a 10ml roller the finish dried orange peely.

I had to use primer on the lower half of my walls to cover up red. (The upper half was beige and I was told that I would not have to prime it.) It totally changed the texture of my walls and I want to get it back to smooth

What is the best color to have primer tinted to so as to have good coverage when painting deep red walls?