[cingo]

I also have the problem with Brava red marks. In particular they are present in the area near the armpit. I solved by putting a piece of sterile gauze (I take a long piece and roll up to make it more consistent): I have put the gauze under the edge of the domes, the domes in this way do not press on the skin. In other areas of the chest the red marks disappear fairly quickly.
I hope this helps.