Tech Tip: Pit Polishing Cork

A common question that we are asked is, “How important is the polishing step of a finished repair?” The answer is, it’s very important. Using a razor blade to scrape off excess cured pit resin is the preferred method for perfectly matching the flat surface of the glass surrounding a completed windshield repair, but fine scratches left from the razor blade creates an opaque finish. When applied properly, Delta Kits pit polish removes fine scratches and brings back the luster, drastically improving the final cosmetic finish. Polishing also helps seal the surface for improved durability. An unpolished surface is far more susceptible to pre-mature weathering.

There are many techniques for polishing finished repairs; one of those ways is by using a Delta Kits 22480 Pit Polishing Cork. In the glass industry cork has long been recognized for its polishing qualities, and when used with Delta Kits 30400 Premium Pit Polish, cork produces just enough friction to warm the surface of the cured pit resin to produce a high gloss finish with minimal effort.

To use the pit polishing cork, put a single drop of Delta Kits Premium Pit Polish over the already cured and scraped pit. In a circular motion, use the cork to buff the pit area until minor scratches can no longer be seen, then use a lint free shop towel to wipe excess polish from the glass. Voilà! The polished pit is nearly invisible and properly sealed against the elements.

Other pit polishing methods include hand polishing with a lint free towel and machine polishing, typically using a cordless drill and a miniature felt polishing wheel. While each method has advantages and drawbacks, we have found cork polishing to be the preferred method for many professional windshield technicians worldwide.

For more information on how to polish a pit using a cork, watch this short instructional video:

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