There are only 3 cases at the BVA regarding Rosecea.
One was denied and the other two were on remand because of VCAA violations.
http://www4.va.gov/vetapp05/files4/0523581.txtWithin this case there might be some help to you if you claim this condition.
Do you have documentation in your SMRs of rosecea?
You need a nexus (link) to your service period and some evidence of chronicity.
I could not find any claim awarded for this but then again- we do not have access to RO awards.
The veteran denied right off the bat claimed rosecea and chloracne due to Agent Orange.