Hi Bill,
If the suite is a protected leather, which 85% of leather suites are,you may during cleaning remove the finish. The finish is 90% polyurethane and 10%plasticisers and oil based makeup may penetrate this: use of a solvent to remove the makeup can take the finish away.
If by chance the makeup is not oil based use a foam leather cleaner, followed by protection cream.
For more advice go to:
www.leathermasteruk.com or
www.lttsolutions.net Here's a protected leather suite below.
Regards Rob: leather technician.