[Tibi Keke]

I have used in the past Tamiya X 22 as base for decals on my Airplane models and sprayed after with Gunze's B 502 Topcoat semi gloss. The models are now 3 years old, everything is the same, no crack now nothing! So you could use this clear over X 22 without any problem. Mr. Top Coat is a bit more glossy than X 22. If you spray them with airbrush, you can mix them both with Mr. Color Thinner. Works fine and hardens better! For polishing you will need to wait some days, Mr. Toapcoat hardens like hell imediatly but will melt under your fingers. So don't rush and let them dry completly!

PS: wear some latexhand gloves!