The SMS Washes are formulated to be less harsh on plastics compared to similar hobby products. Using an oil based paint, they are easy to clean up and provide a subtle effect on your model kits panel lines.
(NOTE: For best results, always seal the layer of paint with PL09 GLOSS CLEAR first before applying the Wash. A smooth, gloss surface will allow for an even coverage within the panel line when the wash is applied)