Mr. Color Rapid Thinner 400ml

I love all of their thinners but this is my favorite. Especially with Tamiya gloss because it stays tacky forever unless you use a hot thinner like this. This stuff is also powerful enough to thin Vallejo and Ammo acrylics for spraying. Sounds crazy but works great.

Great for spraying metallics. Dries before flakes can settle

If you're spraying Mr Color Metallics, you need this. You won't need it for Super Metallics though as those are already super thin.

This is a great product that will help you get the flattest finish.

beware of use on direct plastic as it is a bit "hot". if mixed with paint, can certainly be hand brushed on plastic without the burn. Dries very very fast.