Thanks so much, Louis @lgardner! I did experiment with the various RLM 79 paints somewhat. First, I mixed up some of the new Humbrol enamel and did the '79 touchups. I also sprayed some on the back of a car dealer's plastic car tag as test to compare the three brands. Then I tried the Vallejo on the model. In all honesty, it was hard to see much difference between it and the Humbrol. The Mr. Paint RLM 79 was also very similar on the test surface, so I didn't use it on the model. That might not have been a good idea, considering your comments about paint compatibility. π€ Then I mixed up some Humbrol 63, matt sand, which is also their equivalent of the lighter, earlier RLM 79 and used it for the faded areas, sprayed through the Uschi splatter mask.
I thought about further lightening the original Humbrol '79 with some white for more variation, but decided against that, figuring I had better leave well enough alone.
This morning, I gave the topside a coat of Future in order to protect it from more scratches and scuffs. I had a little issue with blushing with the Future in a spot or two, unusual really, but probably because I was sticking with my new Gaahleri airbrush and I'm still on the learning curve with it. I do like it a lot so far. π
Later today, the two bottom shades get a little touching up and some Future on them too. I should be ready for the decals pretty soon. Yeah, the replacement wing caught my eye when I first got the Iliad Decals sheet and thought it helped give the one-color topside some extra "flavor". I like how it looks! π
You are very welcome for any inspiration I may have helped with! And, I want to wish you and your family a Merry Christmas as well, Louis! I hope too for a peaceful New Year but I am keeping my fingers crossed with that one too. π