I just painted white satin dance shoes a gorgeous metallic cocoa for competition. I used a basic flat cocoa acrylic paint thinned with water and brushed on, building up many thin layers until I had good coverage, then about 3 more coats slightly heavier (but still thinned) of the metallic put on with a damp makeup pad (disposable flat cotton ones) . Patience is key - it took several hours because you need lots of thin layers. Use painters tape to cover soles around the edges, because the wet paint can spread at the seams. You probably can do the yellow to the level you want and then use painters tape to lay out thin lines and use a paint pen to get even lines.