Vallejo - Metal Medium (18ml)

I mixed a tiny drop with my matte blue and got a beautiful metallic sheen without changing the paint's consistency. The plastic dropper bottle lets me control exactly how much I add, which is great for small test batches.

The dropper bottle makes it easy to mix just a few drops into my acrylics for a subtle shimmer. It works fine over dark colors, though I wish the 18ml size were a bit larger for the price.