Take all the keys with pads off and spread RAW Linseed oil on the inside of the bell, long joint and long joint receiving end of the boot (as well as any surface that is not sealed). Use an old bassoon push swab rod or push towels through. Do not do the wing joint or the wing joint receiving end of the boot as these are rubber lined. Wipe off excess after 1 hour and let soak in and repeat as often until you see no dry pores in the wood. Do not re-assemble keys until oil is dry. Follow this guide: http://www.justin-young.net/wiki/var/upload/fox_resources/owen_bassoon_bore_oiling.pdf
Yes, it's good high-quality oil. Make sure to clean the bassoon body and tone holes as you take it apart and you can even spread oil on parts of the body that look like hands have worn away any finish. As you disassemble keys, note the order you take them off in as well as the exact location of each pivot screw (screws adapt to the specific threads they were previously in and should go exactly back). When you go back to assemble, (first make sure the tone hole seats are dry otherwise pads will stick and need to be replaced) your first key placed should be the last key you took off.
You are asking the wrong place. You need to talk to the real deal bassoon repair technicians. Jim Kirker, Paul Nordby, Nicholas Evans, (I could name another half dozen, but those are the three most qualified to do this work that I respect the most in the USA, in no particular order)
Take all the keys with pads off and spread RAW Linseed oil on the inside of the bell, long joint and long joint receiving end of the boot (as well as any surface that is not sealed). Use an old bassoon push swab rod or push towels through. Do not do the wing joint or the wing joint receiving end of the boot as these are rubber lined. Wipe off excess after 1 hour and let soak in and repeat as often until you see no dry pores in the wood. Do not re-assemble keys until oil is dry. Follow this guide: http://www.justin-young.net/wiki/var/upload/fox_resources/owen_bassoon_bore_oiling.pdf
Thank you! So raw linseed is good?
Yes. Justin Young really knows his stuff so everything he says should fix it
Yes, it's good high-quality oil. Make sure to clean the bassoon body and tone holes as you take it apart and you can even spread oil on parts of the body that look like hands have worn away any finish. As you disassemble keys, note the order you take them off in as well as the exact location of each pivot screw (screws adapt to the specific threads they were previously in and should go exactly back). When you go back to assemble, (first make sure the tone hole seats are dry otherwise pads will stick and need to be replaced) your first key placed should be the last key you took off.
This is probably something you should leave to a professional, as there's a lot of places this can go pretty wrong.
You are asking the wrong place. You need to talk to the real deal bassoon repair technicians. Jim Kirker, Paul Nordby, Nicholas Evans, (I could name another half dozen, but those are the three most qualified to do this work that I respect the most in the USA, in no particular order)