Below is a photo journal of a repair done sometime during March 2014 for a good customer of mine, Minh. It shows both how a repair job wears in, as well as wears out around the surrounding reinforced areas. I had previously repaired the crotch of these jeans a little over a year ago on the two back panels of the crotch.
These are close up photo's of the two repaired back crotch panels. It has begun to wear around the reinforced area. The two front crotch panels had not been reinforced and has begun to wear along a common spot for holes to occur. Minh was able to get the original repairs in early before they had worn through as a complete hole. This is generally the best time to reinforce the crotch.