Mix resin 100 parts to 1 part catalyst for an approximate 30 minutes working time. Only mix enough resin for a given patch.

7. Lay patch over hole, cover with cellophane and squeegee out air bubbles. Allow one to two hours to cure, then remove cellophane. See Figure 2-84.

Figure 2-84. Squeegeeing Patch

8. After the patch is cured, remove the cardboard from the outside of the hole and rough sand outside surface, feathering the edge of the hole. See Figure 2-85.

9. Mask area with tape and paper to protect the surrounding surface; then repeat B Steps 5, 6, 7 and 8, applying patches to outside surface until enough material has been laminated to re-establish the original thickness of the section.

Figure 2-86. Blending Patch with Sander

11. Mix gel coat or filler coat with catalyst. Work Gel Coat into patch with fingers. See Figure 2-87. Filler Coat should be filled into patch with a putty knife.

12. Cover with cellophane and squeegee smooth. Allow to cure completely before removing cellophane.

13. Sand the patch with 220-grit wet sandpaper; then use 600-grit for finish sanding. On painted type surface, paint can be applied at this time. Buff with polishing compound and wax.

Figure 2-85. Rough Sanding Outside Surface

10. Allow the patch to cure overnight; then sand with dry 80-grit paper on power sander. Smooth the patch and blend it with surrounding surface. If air pockets are present, puncture and fill with catalyzed resin. Let cure and resand. See Figure 2-86.

Figure 2-87. Working Gel Coat into Patch

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