Can you assemble the grousers to the the chains and then paint them all at once? even as a parade tractor, or a light tillage machine, the pads would work loose if there was paint between the grouser pad and the rails.
They will work loose with any work at all if the mating surfaces are not clean, put the whole lot together and spray them afterwards.
Thanks to all for your comments and advice. I will leave the mating surfaces unpainted. I am thinking I will mask off the mating surface on the chain links, paint them, then bolt on the pads and paint them. In this way, I will be sure of getting good paint coverage on the tops of the bushings and those areas of the links not readily accessible after the pads are installed.