Been looking at this thread for awhile. did you do your cut n buff yet? matching the existing paint texture should be pretty easy, just don't sand it down all the way, leave some OP. A pic to illustrate what Im getting at. This was just one pass with 1200 on a block.
I went on to get my panel completely flat, but maybe a quick scuffing is all that you will need for what you are trying to do. I like your work area btw, very roomy!!