When mixing TotalBoat TotalFair epoxy fairing compound components, it is extremely important not to whip or mix the product too quickly, as doing so can add air bubbles, which can present themselves as pinholes when sanding the cured product. This can be remedied by forcing more TotalFair into the pinholes with a putty knife or spreader, or by using a high-build epoxy primer over the TotalFair (for paint applications).