Thank you Chris, I appreciate that. this is a good time to share a learned lesson. I used a Vallejo white acrylic and then forgot to clear it, I normally do. I really thought I was going to have a mess, until I took a breath and dipped the Q-tip into water and went to work. I found I was able to manipulate, for things like wheel bays anyway, the flow even better and leave more here and less there, I still need to use the brown, but I will wait until it is completed and then add grime. I do that because I tend to add too much at this stage and can't see the "Whole" picture.
Know your limits LOL good advice for me anyway.
Thanks,