Was three years ago that I did that one, honestly can't remember how much paint I used! I wouldn't have thought it was more than a standard (750ml?) can. I glassed over various holes etc first, then faired with filler. Sanded the whole thing fairly extensively with an orbital sander. Then painted with International Pre-cote, with a bit of orange brightside in it to give it a slight orange tint. Sanded again after that a bit, then rolled the Brightside on. It's worth putting a dash of the correct thinner in, or warming the paint first so its nice and thin when you put it on. Several thin coats, sanding lightly between each one. If it all goes totally wrong you can always just sand it down and start again, plus Brightside is pretty cheap
Got a pic of the console you are thinking of doing?