I'll reserve comment on my efforts.
James
I have to tell you guys, between Bill, (WDS) and James, I'm sitting here shaking my head. I buy matt 72 by the case and have been using it for more than 40 years. I don't get where the blue/grey comes from. That has never happened to me.
Well, it's difficult to judge photos of a model that is hundreds of miles away. But complaining never gets results, so, onwards and upwards. There are two problems;
1) The color is off, and because you are using the colors I recommended, that blame has to land on me and:
2) it isn't done thoroughly and you are not to blame for that as well. I would have stopped early too if it had looked like that.
What to do? Well, first, I would tell you to make a new mixture after I look into it today.
Bill got the same color, so he switched to a mix of Matt 66 olive drab and matt 159 Khaki drab. From what I have seen, it worked well for him. Here is the link;
https://www.modelersalliance.com/forum/weathering-olive-drab/97564-wds-m4a3-105mm-hvss-sherman?limit=8&start=16
Then scroll near the bottom of the page.
Unfortunately, Humbrol has discontinued 159 Khaki Drab and it is no longer available. Like me, Bill probably had some in stock or was fortunate enough to find one of the last tins at his LHS.
James, if you will have patience, I will experiment with the colors you have and see if I can come up with a satisfactory mixture.
I promise I will post tonight the next lesson and include this phenomenon which I don't understand at all.
Most guys are following way behind, so, please, have patience, although I don't understand why, I have to take the blame!
My apologies,
Bob