Eddie, I would not think mixing base and clear would be compatible. I have known others to mix SS and clear but never base and clear. That is a new one on me. I have two coats of straight Concept and two coats of 50% SS/clear.
I guess I really don't understand why. Would it not take a bunch of coats for coverage, or did you get coverage before you started the base/clear? Even if they were chemically compatible with the lack of UV protection in the base additional clear would be needed,
i would think.
John