Look at the screws first. If they have been buggered up the gun has been messed with. Look at the details. Most refinished guns will have been polished too much and will have engraving, lettering and any sharp lines or edges rounded off of smoothed too much. Factory is crisp, refinished is fuzzy.
Colors are easy to figure out. They have to look right. Just look at a few hundred real guns and you will spot most recased color from across the room.
Almost all stocks have suffered from a touch up with Trueoil at the hands of an owner or gunsmith. As long as they did not put it on too heavy no major problem.
If you are looking at guns as an investment then you are barking up the wrong tree. Long term they migh hold their value but they are not great investments. Buy guns you like to hold, shoot and enjoy them. The world has enough closet queens already.
