just my 2¢. these early "beefy" tubed Rocky Mountain aren't too prone to cracks. it's the later mid/late 90s ones that are made from lighter/thinner wall Easton alum that are.
only location you really had to check was the welded on seat clamp section. and if it hasn't by now, then it will probably remain that way if the proper seat post diameter is used and the clamp not over tightened. and even if cracked there, it is easly repairable and done right, should not be a problem in the future.
now regards to the finish, i'm sure why they ever pearl/clear coated the raw alum for the year or two that they did. the years they left the tubing as raw alum are so much better condition in comparison for aging.
if i were you, i'd probably strip the coating and polish it up to give it a new life.