Greg,
Cats are notorious for leaving scratches that get infected. You will want to clean the scratches good - use either hydrogen peroxide; betadine; or even "Band-Aid antiseptic wound wash for kids" made by Johnson & Johnson. It will be easier if you use a q-tip if these cuts are near the eyes. Don't get any of these in the chameleon's eyes.
Next, the best cream for wounds is SSD - 1% silver sulfadiazine cream - but this is only available through a doctor or the vet. If you can't manage that - get a triple antibiotic ointment from the drug store and use that. Again - use care in applying.
You will want to clean, pat dry and apply the ointment to each of these scratches twice daily. If you notice any infection (swelling or oozing), you will have to take the cham to the vet. It may need oral antibiotics in addition to the topical ointment.
The marks (which will turn black) will take several sheds to go away after the cuts heal.
Good luck...
-----
