Safe to Use TCA Peel on Just a Part of the Face?

Is it okay to do a 25% TCA peel on some areas of the face but not the whole face? I want to try it at home. What would you recommend? I want to do a Chemical peel to get rid of some acne marks and make my bumpy skin absolutely smooth.I am light skinned and 32 yrs old. I have been using obagi nuderm. I've been on obagi clenziderm for a month. I am a medical student and do not get time to go to places to get these treatments done. I would prefer doing it at home. I'm open to as many suggestion as you can give. Thanks.