I have brand new unfinished cabinet doors to replace my old doors. The new ones are paint grade pine with MDF inserts (shaker style). I have a Graco x5 and have been practicing using it on test doors already and will spray the doors outside in a home-made paint tent. I plan to brush the cabinet frame faces as spraying indoors will be unwieldy and messy. Now I need to decide what paint to use. I have experimented with Sherman Williams ProClassic oil paint Semi-Gloss finish with a 313 FF tip, thinned with paint thinner (3 to 1) with Penetrol added, and it looks great. But the cleanup was a nightmare, and I am nervous to use that paint indoors when I brush/roller the cabinet faces (only faces and sides, not inside the boxes themselves). I have heard water-based Alkyd paints are as good, like Benjamin Moore Advanced or even the Sherman Williams Alkyd pro classic. Will that spray as well as the thinned out oil? Is there an oil based BM Advanced to consider? Also I heard I should use shellac primer like BIN. Should 1 coat be enough for the doors and the boxes inside? Should I sand after primer and in-between coats? And with me 3 to 1 thinning, should I do more than 2 coats of finish paint? Would there be a difference in color over time with oil paint? Will there be a difference if I did oil on the doors and brushed on alkyd inside on the faces? Lastly, if I use Alkyd paint, should I use Floetrol (the water based equivalent of Penetrol) and or thin it for spraying with a 313 FF tip?

i have 2 red walls that need to be covered in white. other walls are white. i have half gallon leftover valspar paint /primer ultra base A flat and 2 coats on a 3x3 test section have not fully covered the red. i'm happy with that paint being my color however it comes out of the can. i definitely have to buy another gallon of something. since this is 3 coat job apparently, should i just get cheaper paint and do 3 coats with that or am i lucky if 3 coats of the 33 dollar paint covers the red or any other suggestions appreciated.