pjzstones wrote:but i was able to see to marks pretty well in the sun light anyways.
Sunlight is always the best source of light. The best way I have found to do it is to stand the with sun behind you and look at the key while it is in your own shadow.
If you ever get a nice warm sunny day, give it a try. You'll be amazed at how clearly the marks will show up.
Adversely if any of you ever have to do this for work, outside on a rainy day. I feel your pain.