Glass magnesium board can be done directly in the above matte varnish
Matte surface due to relatively thick, and there will be different degrees of small pores, it is best to do a layer of primer, so that the surface more beautiful.
Glass magnesium board and glossy surface, smooth surface due to production needs, will be coated with a layer of release agent, the release agent with the paint affinity is not very good, it is best to do a interface to deal with or sand, Adhesion effect.
Above the best to do a layer of processing or easy to fall skin