I have had a successful full-on trial!
I was worried about covering my bra in makeup smudges, but I have found a method.
I pumped myself up, then applied Maybelline Super Stay 24 Hour lip gloss to both nipples. This is a fantastic long-lasting, non-streaking lipstick. Then I slipped into a baby doll, with see through lace cups, and no bra. It gives me enough support for indoors.
I placed clear plastic nipple shields over the made-up nipples, and my boob colouring was fully visible through my lace cups. I matched my lip color to my nipples and then spent all day in full makeup, negligee & heels. Wow! I felt good.
However, it triggered an online shopping spree for much darker lip colors and barely black stockings to match the baby doll.
There was no smudging, and this makeup method, plus nipple shields, could be worn all day under a suitable bra.