A few years ago I bought a full mixing setup at auction and have done quite a bit of experimentation since.

These are my favorite formulas for satin, “white” trim.  (Based on Benjamin Moore where “1” = 1/32nd of an ounce.)

General warm white:  To satin, Base 1.  ½ MG (1/64th oz magenta); ½ OG (1/64th oz orange); 24 GY (grey).  Not all mixing equipment can deliver 1/64th of an ounce.  The magenta and orange add a touch of warmth and the grey relieves glare.  This looks great in most environments from pastel to saturated.  Does not go in bright red/red-orange/orange environments.  If uncertain take a large sample into the painted space–if it screams “pink” beware.

Brilliant white:  To satin “white”.  3 BB (bright blue).  This works wherever the tiny amount of pigment in “general” is overpowering.  It is extremely cool and bright.

Warmer white:  To satin, Base 1.  1 MG; 1 OG; 30 GY.  This is a bit warmer than general.  Looks especially well in a bright yellow-orange environment.  (The bright orangish-yellow that is really common now–too bad it’s being used so much though.)

Two coats underbody, two coats enamel produces the most rugged and smooth finish but takes a lot of time.  Through 100-grit sandpaper on the wood, 150-grit between coats is as far as you need to go with sanding when painting.

Have found that Pert shampoo is the BEST for final brush cleaning–I swear it extends the life of brushes considerably–especially natural bristle.