Two words that are not in my windshield repair vocabulary are "disappear" and "invisible". The reason is that the resins used for windshield repair are formulated to match as nearly as possible the refractive indice of glass, but it is not exact. Because of this, light enters the glass and the resin at different angles. The different the refractive indice, the more "sparkle" you will see when viewing the repair from certain positions. The thinner the resin you use, the more pronounced the sparkle is likely to be. However, if you can see the repair at some angles, but not at others, it is a good repair, structurally sound. I try to "undersell and over perform" .... that is to say, I help the client understand that the purpose if windshield repair is to restore the structural integrity of the glass, and that the cosmetic benefits are secondary to that, and they should expect to be able to see the scar of the repair, so they dont have unrealistic expectations. Then when it turns out very well, they are thrilled.

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