Another option would be to convert your surface to Sub-D with the Power Surfacing plugin to display the underlying iso-cuves.
There is always face curves inside Solidworks as well.
http://help.solidworks.com/2012/English/SolidWorks/sldworks/HIDD_DVE_CONVERT_ISO_CURVES.htm?id=1af44d34ac3a4e5c926f944e9be34865