How do you apply gelcoat over TotalBoat TotalProtect?

Gelcoat can only be applied over TotalBoat TotalProtect epoxy barrier coat once it has completely cured for at least 48 hours under normal application conditions, becoming a completely inert coating, and it has been sanded with 80-grit sandpaper.  

Gelcoat will cure if it is applied to an inert substrate, such as completely cured TotalProtect, but it relies completely on creating a strong mechanical bond. Sanding the TotalProtect with 80-grit sandpaper, then thoroughly removing any of the the sanding residue and surface contaminants with acetone will give the gelcoat a properly prepared surface to bond to.