Hi NJBrandt and thanks for this post and question. The responses here are all designed to look out for your health and safety. If you have been diagnosed with COPD, and are using continuous supplemental oxygen, the issue can be reduced to two concerns, from my perspective.
The first is if anything in the salon (scents, sprays, coloring materials, etc), would act as triggers for your present condition.
The second is if anything in the salon would be generating an electric spark of some kind. We all are aware that oxygen supports combustion.
As has been suggested in the earlier posts here, you may want to discuss this with both your physician and the salon owner.
Please do check back and let us know how this all worked out.
Good luck!
Leon (site moderator)