Just a try, nice technique, but one needs to be fast with skim coat - this is what I used to create this structure. Unluckily, I do not own acrylic paints ( not anymore, at least ) , didn't need them for such a long time... so I used oil paints. I knew that it wouldn't be the best option and the best result - but you work with what you've got. So, the outcome, I may present :
The purpose was to make the roses stand out from the canvas. Sort of mission accomplished.
Nighty night folks.