Major thing that needs to be considered is the location and size of the damage. If damage is at the edge of the windshield then it will spread fast and will destroy the integrity of the glass. If any edge damage is found then fix auto glass it soon. It will save the life of your windshield.
Car manufactures line the interior of the trunk with carpet. Especially the floor of the trunk. Lift the carpet and look for condensation, corrosion, welded panels and color differences relative to the body. This may indicate improper repair of the rear of the vehicle after an accident.
Every day people are buying into the dream of owning their own business, with windshield repair being at the top of the list due to the low start-up costs involved. Most will fail.
On most car windows there is a small triangle printed from the manufacturer. Under the fix auto glass repair serial number is a small point with a number. This is the year of manufacture of the window. With popular car models this figure represents the model year. For example a 7 would indicate a model from 1997. If one window has an alternative number it may mean that the window has been replaced due chip or crack damage (windshield) or burglary (side window). If the windshield and side window have a different number from the rest of the windows, this could mean that the car has had a collision. Due to damage the windows have been replaced.
The curing time for the adhesive is one of the areas people pay the least attention to. The adhesive will take time for it to be completely cured. The minimum is a few hours but it is always best to let it stay there without the car moving for at least a day.
The next step is to open the syringe and placing it in the pedestal. The plunger has to be pulled out from the syringe and released. The compound will be forced into the chip. The process has to be usually done about ten times. However it varies on the brand.
I want to congratulate you on your decision to start a windshield repair business. It can be a fun journey and profitable experience with the right guidance.