Flat Base/ Future is kinda cloudy.

I sealed a model with a 3:1 mix of Future to Flat Base last night, as per the Complete Future article. I think it said this would be "very flat".

The end result was to make the colors almost grey-out a bit or get a little cloudy. It's only really noticeable on the darkest color, a black/brown, but there's quite a bit of it on the model.

My question is, is this what "very flat" looks like or did something go funky?

And I know I saw a thread on here about someone having a similar problem and fixing it with another coat of something, but I can't find that thread. So for a second question, any advice for how to maybe de-flatten my colors a bit?