If you have the radioshack desoldering tool (one of the few things they ever got right!), you can remove the chips quickly without ruining the traces. You just have to add a little solder to the joint with the bulb pressed and when the solder joint liquifies, release the bulb and the solder comes right out. It takes a little practice to use it but once you got it down, this would only take 40 minutes to unsolder all the chips at a few seconds per pin. Then you clean the board and inspect the traces.