A833OD with worn output spline

10/4, I will try to measure the better looking of the 2 shafts, and compare to the 727. As the 727 is at a friends shop, it may take a couple of days to net the results. The original shaft is hard to measure, as the splines have a ridge on the top on the drive side from repeated hammering due to excessive clearance. This will skew the measurement, as the tops of the spline teeth are no longer flat and consistent. I am assuming the distance between the splines is referring to the measurement between the tips of the teeth. I expect this is where I will see the issue, as that would indicate the wear on the mating surfaces. The question is, how do I deal with that? Is it possible to teflon coat, or flame spray the spline to build it up, then machine to proper tolerance?