My '74 2.0L was painted about 25 years ago in two-stage base/clear coat. The paint job is in excellent driver quality condition and looks great from 5 feet away. Up close it has faint water spots that appear to be etched into the clear coat.....mostly on the flat areas; hood / trunk surfaces. I've detailed the entire car by hand....washed, clay bar, polished, waxed, etc. and the spots are still there. What would be the best advise for possibly removing the spots? I've never needed to or used a buffing machine before.....the past 35 years I've detailed everything by hand. Should I consider buying one or just take the car to detail shop?