I put down some rattle-can gloss first. Let that fully dry. I then put down Mirco Set. Soaked my decals, slid them over, and dabbed a bit of excess and immediately hit them with Micro Sol. They flattened down for the most part with little coaxing (had to push some folds down with a cotton swab). Generally, that process gets them to settle right and eliminates silvering.
Hope that helps you out!