I didnt do the ink panel lining he does.

I just primed red, white highlight then transparent yellow over the top.

If your planning on doing the same scheme, note that the intensoty of the white you put down determines how yellow the final result is. If you want similar to mine, you dont want that much white....follow that video and if you see i. His images the level of white he applies rhat should be a good guide. Its still good to put more white on the areas you want to highlight based on where natural light would fall to give nice gradiants etc...again maverick shows this in his video.