I think glass polishes with abrasives are a different animal than paint polishes. They don't have the lubrication to them paint polishes have, therefore they must be kept wet by spritzing water on the glass as they start to dry to extend the work time long enough to get results and possibly to break down the abrasives.
CeriGlass works much the same way if you don't "keep it wet"...it will dry up so fast you do not have enough time to remove defects or contaminants you are going after when working by machine.
Glass polishing also seems to be most effective with a DA when performed in an aggressive manner. This means high speeds (wide open) and almost as much downward force as the machine can take. You must make your DA machine work as aggressive as possible, as conventional wisdom tells us glass polishing can only be done effectively with a rotary - which simply is not the case with today's products.
Of course, all this creates tremendous amounts of heat, making the polishing work time even shorter and results non-existent if supplemental water isn't being applied.
Just my thoughts of what have may have gone wrong here.
