Groot
I make my washes with turpentine or paint thinner from Home Depot and use them over both Future and Alclad Aqua Gloss, both being acrylics and have no issues whatsoever. Alclad Klear Kote flat is not lacquer but enamel based. I emailed Alclad regarding what to use to thin the clear flat and they said nothing harsh like lacquer but enamel thinner.
The problem I have when spraying Future is that I do not get a smooth finish but pebbly and orange peel. I have tried different air brushes, different psi’s, thinning, played with distance, etc. I hand brush it with a wide soft brush and then I get a glass smooth finish.