Clearcoat

That's exactly how it is! Once you have applied the metallic or pearl base coat and it has dried to a matte finish, it is important to apply 2k clear coat to protect the surface and give it a glossy finish. The clear coat will make the surface more resistant to scratches and other damage.


Hardener

On the side of the clear coat , the acrylic paint, there are instructions on how much hardener should be used.

Thinner

On the side of the can there are instructions on how much thinner to use.