Hi Rich,
The tape is a big help in analysing exactly where on the clubface the ball was struck. It can provide us with some useful information. However from this information alone we cannot tell a particualr swing fault. For example, a strike off the toe of the club could be due to several things.
1. We could be standing too far from the ball at address and stretching to meet the ball.
2. It could be that due to some swing fault we are coming down across the ball at impact.
3. It could be that the clubface was toed in (hooded at impact).
...and the list goes on.
Without a watchfull eye it is hard to pick up on which it could be.
Knowing the ball flight would in addition to the strike on the clubface would give us much more information. The ball flight vary rarley lies.
here are some links I found for impact tape/paint:
innovagolf.com golfcow.com shotsavers.com