Use the Correct Type and Grit Sandpaper
Thorough sanding is required to ensure optimum mechanical adhesion and to create a smooth finish. Prior to sanding, ensure that the surface is clean and well degreased.
Avoid mechanically sanding in combination with coarse sandpaper as this causes too rough sand marks and may also result in sanding down to much film thickness, hand sanding is best. After sanding, remove all dust and degrease once more.
Bare surfaces, primers, undercoats and fillers need to be dry sanded in order to avoid the absorption of moisture. Sand bare wood along the wood grain.
Sanding between fresh topcoats and varnishes can best be accomplished by wet sanding with a fine grit wet or dry sandpaper and water.
Sanding Bare Surfaces:
| Bare Fiberglass / GRP: | P320-360 Grit, Dry Sand |
| Bare Steel: | P60 Grit, Dry Sand |
| Bare Wood: | P180-220 Grit, Dry Sand |
Sanding Painted Surfaces:
| One-Component Primer Coats: | P220-320 Grit, Dry Sand |
| Two-Component Primer Coats: | P180-220 Grit, Dry Sand |
| Fresh One-Component Topcoats: | P400-600 Grit, Wet Sand |
| Fresh Two-Component Topcoats: | P320-360 Grit, Wet Sand |