With the tank, once you've used it a few times I think it will be fine; just wipe it over before you use it. The enlarger may be more of a problem, the bellows may have decayed in which case check for holes with a torch. You can make your own bellows at a pinch. But the metallic parts should be Ok, just wipe them over with a moist cloth, perhaps with a little Dettol or TCP on cotton wool swab.