Have seen lots of lightning burns, most small strikes seen to leave a small raised tag of skin material where its entered and left the airframe (usually on top and bottom of the fuselage, but did have an exit burn on the bottom skin of the wing recently). Metal wing tip nav light housings are also good exit points, leaving deformed/melted areas and crazed or cracked light lenses.
Any one got any tales of severe hail damage!! I worked a 737 not that long ago that had all 6 l/e slats peppered with hailstone damage but no evidence anywhere else on the airframe of hail. A friend told me of a severe storm that hit a Spanish airfield where Bae ATP's were being stored/maintained, and that some of the damage was so bad that upper fuselage skin panels had to be changed !