I would suggest a lubricant over a penetrating oil.Use PB Blaster
There is a bakalite busing in the boom swivel about 1" x 5' long, can be removed and greased and reinstalled.Hello MEP001,
i have uploaded pictures of my booms. Any insight is great appreciated.
Thank you.
Coleman booms, the high pressure ones should not be oiled or greased. Maybe you can find someone who can machine some nylon bearing inserts. I usually just replace the boom.
The wall mount booms are just going to squeak unless you re-engineer them to accept a nylon bushing.