Whoa, cool weird pipe. Looks like it's in pretty good shape to me. I'd just run some water through it, scrub off the stummel, wipe out the chamber with a paper towel real good, clean out the insides with alcohol and bristled cleaners, and try smoking it before doing anything more drastic.
But I still don’t know how to clean the inside.
Is it painted that color? That's what it looks like to me.
Looks like a Ruf-Tone from the eighties. Definitely briar. There were some brylon pipes but not the Ruf-Tone. That stinger won't come out without having to change the whole pipe. Just use pipe cleaners on the stem and soak the stinger in alcohol. A thin pipe cleaner will usually exit the hole at the end and get it clean for you.
I also keep bottle cleaners and the like on hand, so I usually have something thin enough to get in there if it is a little gummed up. Grocery store usually has some small ones.Yup. After thinking about it the threads on the stinger are the only way to attach the stem to the shank and I don't think it comes off. Now where can I find one of those super thin piper cleaners... Hmmm....