You may be asking for trouble as you start to dabble with higher concentration with glycolic acid or TCA chemical peels on yourself without explicit guidance from your board-certified dermatologist. I have seen few semi-permanent scarring from self-applied chemical peels. To get the best results...
If you are 41 and have "very white thick skin...good tone" and have already had Titan and Thermage, you may well have maxed out what non-surgical treatments can do for you. Fillers are clearly the best for the nasolabial folds and nothing gets rid of fine wrinkles under the eyes or...
TCA peels can be done on small areas of the face or individual spots but should only be done by a doctor with years of experience since you don't want to scar up your face with a home treatment. A cortisone cream should be applied 3-4 times the first day and twice a day thereafter for 10 days...