Tamiya mini acrylic XF-86 is a water-soluble matt acrylic coating product that was developed by Tamiya. XF-86 can be applied with an airbrush or brush and for thinning the thinner X-20A is recomended. 

For the shiniest result, sand and buff before applying multiple coats of XF-86, letting the piece dry completely between coats. Two coats are enough for many applications, but no rule exists. Each bottle of the Tamiya mini Acrylic Paint Series contains 10ml.