A thing of beauty is a joy forever be aware that the converse is also true.
Many Flying Scots are quite old. (Are they still making them?) They are therefore likely to have soft spots from repeated flexing and/or water infiltration. A new coat of paint can cover a multitude of sins. Push it in in various places and see if it gives a lot - or not too much. (It's a bit like buying skiis - you have to bend them.) If you plan to race, soft areas are not a wonderful thing. I don't think the hull is cored on these boats. If that is the case, water "in the hull" shouldn't be a problem unless osmosis has caused delamination in freezing/thawing cycles. This would show as blisters - possibly painted over. Listen for "crackling" sounds when you push, everywhere. These are the sounds of the broken fiberglass strands rubbing against each other. Broken strands are not helping to hold thiings together the way they used to. If you're just planning to daysail, soft spots and crackly sounds aren't overly important, except as they might lead to eventual failure. Probably not on your watch though -- if it's lasted this long, it will probably last a bit longer. On the other hand, if you want a pretty boat, get a Thistle or Lightning.