While these skins are definitely high quality, there are a couple touch-ups that I would suggest;
First, red number boxes that match the LMP1's would be appreciated on the Blue-and-white #21 car. Putting the numbers on both cars in a bold font will also help make them appear more visually in-line with the other Le Mans cars in AC.
Second, since Michelin are still set to be the primary tyre supplier in the WEC for the foreseeable future, it might be worth considering replacing the tyres and tyre sponsorship logos from Pirellis to Michelins.