I just wanted to share what I did to fix the order issue with my original ashtray.
The ashtray was is perfect shape from the outside but smelled like...well, an ashtray. I tried several cleaners along with vinegar and alcohol but nothing worked, also it was rusty on the inside. I then thought of Phosphoric Acid because it would get rid of the rust and leave a phosphate coating. I was careful to keep it on the inside and not splash the outside, I filled it up to the light holes in the side which covered the rust completely. I then checked it after 15 minutes to see how it was working by shining a flashlight into it to show how it was working on the rust.
Not much happened so I move my reminders out to every 30 minutes and kept checking it and after 2 hours...all the rust was gone! After a thorough rinse and dry, it looked good and no smell whatsoever! If you have to have have a perfect ashtray inside and out then this doesn’t do you any good but I just wanted it to look good and not smell bad.