Any pics of your figures?
And to answer your question - I wouldn't say that after you seal your figures you won't get any paint loss from scratching, but it will cut down on it significantly. And I'll just repeat what's been said a few times on this board by a few people - I know Gregorbian has told a few people this. The paints you buy at the craft stores and at Wal*Mart are good, but when you are painting figures and other items that are going to be handled more than a little bit, you are better off buying a more quality paint. I tend to like the Citadel brand, as well as some of the acrilyics from Tamiya. Both companies make paints that are meant to be used to paint model kits and metal miniatures, so they are able to withstand a little bit of wear and tear from handling (or from movement of joints and such). They are a little more expensive than the craft store paints - they are generally around $3 for a small bottle - but in my opinion (and many others) the results definitely justify the price.