Yet another wash question

With enamels as a base coat, you need an aqueous system barrier (an acrylic clear coat like Future) between the base coat and any wash using enamel or oil-based paint. Alternatively, you can use a wash made from acrylics or any aqueous system (ink, watercolor, etc.) and a drop of dishsoap.

You can apply a water based wash over most acrylics if they are fully cured, providing you work quickly and carefully, with a minimum of dwell time before wiping and a very thin wash. However, I find it much easier to use "opposite" coatings systems for base coats and washes. 

I have not used Microscale gloss but I believe that to be a solvent based product.  The wash you are using is also solvent based and will dull/damage/remove the base coats. If you want to stay with an oil (solvent) wash your gloss coat should be acrylic base, like Future. 

The alternative is as you said... an acrylic/water/dish soap mix.  I use finely ground chalk pastels in place of the acrylic in the above mix. A cheap mortar and pestle available in the kitchen gadget dept. grinds the pastels to a super fine powder.  This can be used on any well cured gloss coat and washes off easily and completely if need be.