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Figure 2J-8. Rough Sanding Inside Surface

3. Rough sand the inside surface, using 80-grit dry sandpaper, feathering back about two inches all around the hole in the area the patch will touch. See

Figure 2J-8.

4. Cover a piece of cardboard or aluminum with cellophane and tape it to the outside surface with the cellophane facing toward the hole. Aluminum is used as backing where contour is present. The al

Figure 2J-9. Taping on Backing should be shaped the same as the contour. See Figure 2J-9.

5. Cut than hole.

mat to shape of hole, about 2" larger

6. Mix a small amount of pre-accelerated resin and catalyst and daub resin on mat, thoroughly wetting it out. This may be done on a piece of cellophane or wax paper. See Figure 2J-10.

Figure 2J-10. Applying Resin to Mat

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