Why force the issue. I am crazy and there is nothing to lose. On to Jimmy's trick. If your seal turns to fog or white all over your model. Let it dry out good. Then hit it with gloss vanish. Magically it returns to normal looking. No shit! I am totally stunned.
I used Testors pro gloss and GW matt afterwards.
My yellows toned down and the gunmetal looks crappy. One or two quick highlights, then I should be good to go.
Blood Angels tanks pre
Blood Angels tanks post