Labrie EXPERT Maintenance Manual page 243

Grit blasting (#50) or sandblasting (#80) for a 1.4 to 2.4-mil deep profile.
 PRIMARY COAT:
Dupont Black Urethane Primer #373p27678 to get a minimum thickness of 2 mils (dry).
 FINISHING COAT:
Dupont Emron Elite Paint 2-mil-deep single coat (dry).
At the end of the painting process, the product must have a minimum of 4-mil surface thickness.
General Maintenance 233