I recently drained my differentials and noticed my front end was green. Reading about it, figured it was the axle seals and the grease and gear oil mixing. In about 3 weeks I’ll be rebuilding my knuckles (first time) I’m just away on travel until then. I took this photo of my knuckle before I left with abnormal rusting. How bad is this? Is this something I should be worried about when I’m rebuilding the knuckle. Any advice is greatly appreciated.