Painting Help: Faux marble effect with rattle cans?

So I’ve been experimenting with the saran wrap method to try and get a nice faux marble effect, but I’m having trouble getting the appearance I want. Instead of marble I’m getting a plastic wrap filter effect :x.

I was told I shouldn’t use rattle cans or acrylic paints, but I’ve heard elsewhere that it is possible to use these, but you need to spray a slightly heavy coat. Brushed on water-based paint was also suggested.

Could someone give me some tips on how I should be doing this? Any tips would be greatly appreciated!