dunno if sum1 already said this, i dont prefess to be any kind of master in the paining area but i have always gone with the idea of "do the lightest colour first" so in your case do the whole key board in yellow, then mask out the parts that are to stay yellow, then go over with the black paint, that way the yellow acts like a primer for the black. also it can help to push the masking tape down with a slightly damp sponge... and then let it dry obv looks good tho
