When going through this kind of treatment, and, in general, eliminating as many chemicals as you can is always best. But, it is nice tobe able to dye your hair and polish your nails, I understand completly. Try and get the natural products and do them at home instead of going to a salon-they are very toxic typically.
Also, the products they use are more toxic as well. Try to find natural alternatives such as:

http://gonatural.biz/, http://www.zoya.com/, and many others. 

REcently, I ran into a problem with a patient who was doing the newer nail gel which, lasts longer. IT was a huge disaster causing a lot of problems for her. When I looked it up, I was really taken by surprise, not knowing that is could possibly cause so many problems. This patient told me her best friend did it too and her nails fell off. Her mother did it and stopped after the first visit because it damaged her nails so badly. HEre are a few articles on these products:

http://www.lemondrop.com/2010/07/21/the-truth-about-gel-manicures-plus-shellac-a-new-safer-op/
http://947thewave.radio.com/2010/07/22/the-dangers-of-gel-manicures/
http://www.accidentlawillinois.com/blog/gel-manicures-with-unsafe-products-can-cause-nerve-damage.cfm 

Dr.M