You can usually bet that the front forks of any bike you acquire which is more than 15 years old will need some sort of attention, but this is especially so with one near 50 years old.
I have covered forks a few times in my last projects so let me say that these are very straightforward to dismantle and put back together again, so I shall just look at one or two points of interest. The forks on this CB450 were pretty good considering, though they might not look it at first glance Okay, the gaiters had long since disintegrated, likewise the oil seals,but naturally that would need to be refinished. I expect many people will polish the cases but that is quite time-consuming and I might add that the original finish was not highly polished. You can produce a pretty good job using a fine Scotch-Brite wheel on a polishing machine, but for an original finish you would need to then apply a clear lacquer. I can never see how the lacquer can stay in place without a proper primer (which is the case in practice), but of course the primer would hide the brushed-metal finish. I just keep them as they are and use metal polish from time to time to keep them looking okay.
