Patching Of Holes Punctures And Breaks

If possible, work in shaded spot or in a building where the" temperature is between 70° and 80°F.

1. Be sure surface is clean and dry where repair is to be made. Remove all wax and dirt from the damaged area.

Figure 2J-7. Sawing Out Damaged Area

2. Prepare injured area by cutting back fractured material to the sound part of the material. A keyhole or electric saber saw can be used to cut out the ragged edges. See Figure 2J-7.

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 aluminum

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

5. Cut glass mat to shape of hole, about 2" larger than hole.

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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