I am about to staret the Dot Matrix patterns on "Longing" so I did a little test first. I first painted a black background on a piece of canvas and then put on a row of gold dots. On the photo that is the bottom line.I also put on arow of white dots. Once the white dots had dried (24 hours) I put gold dots on top of them. The difference is clearly seen. I have no option but to first lay down white dots and this means about a weeks work that will simply be covered up but I I have already said a zillion times "Do the best you can" and in this case this means double dotting. Tally Ho.