I have 1 1/2 gallon of Benjamin Moore Latex Pearl for Kitchen and Bathroom trim and some BM Flat paint for kitchen ceiling of the same off-white shade. I am about to re-paint bathroom wood panels, trim and doors same color but would like less sheen then Pearl. I know I can mixed them. My question is - after I mix, for how long can I store it? Because I plan to do job in phases - first - panels and trim... Doors will be later as I won't have time for them now...
After I finish, for how long can I keep that mixture in general - in case I need touch ups?
Can I make and store Latex mixes of different brands?