Valspar Composites
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Mold Repair:

Sanding

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The following are recommended procedures for sanding:

1. When using an orbital sander, place the sander flat against the part then start the sander. Starting the sander first then bringing it to the part can cause dips and gouges.

2. Finish sanding with a sanding block. Hold your block flat and apply the sanding block in a continuous vertical and horizontal pattern across the repaired area.

4. Never "finger" sand. This will cause a distortion in the surface.

5. If you have a puttied area on a sharp radius, take down the initial putty with a file. File the putty down until it is almost level with the surrounding area, without hitting the surrounding area.

6. Finish sanding with a block to restore the area to its original shape.

7. Wet sand the area. Use clean water. This will eliminate any scratches caused by particles under the sandpaper. Keep the sandpaper and surface wet.

8. Use courser grits of sandpaper first, then proceed to finer grits, until all scratches are removed and the surface has regained its gloss.

9. Sand with 180, then 320 grit sandpaper.

10. Wet sand with 400 grit paper to remove the 320 grit scratches.

11. Wet sand with 600 grit sandpaper to take out the 400 grit scratches.

12. Wet sand with 1000 grit sandpaper as your final step before buffing. Sanding with 1000 grit will bring the shine back to the part.

 

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The information and recommendations found in this web site
are intended for FRP Professionals. Results of repair or maintenance are dependent on
many variables. No warranties of any kind are expressed or implied.