Weird question

with a little elbow grease, you can make almost all of it very presentable. I would just get rid of the rust under the m. cylinder, and maybe mask it off and spot that area in and blend it. It doesn't have to be perfect, the area under the m. cylinder is somewhat covered up, anyway.
I use a witches brew of SeaFoam/ Marvel Mystery Oil to clean the rest and protect it further.