2007 LX, undercoated, and some of the ACH bleed valves do not have the rubber covers so there is some coating over them. I'm wondering if I will be able to drain them/if the little hole is plugged up. Can I run a small wire up in there to clean it out, or will loosening the lock nut allow fluid to flow anyway? I was thinking about using a dremel with light wire copper brush to clean up these nipples beforehand. Am I thinking clearly on this project?