Speedmaster Bezel Refurbish

Hello all, I decided to repaint the bezel of my Speedmaster so I went about researching the best way to do it.
I belong to a FB group for Omega watches and asked the members if anyone had experience with it and several members replied. I followed the advice and the project turned out great!
I put the watch away and a few days later when I got it out I noticed all the paint was gone.... it was like it had been stripped. I hadn't worn it so my sleeve couldn't have rubbed it off, I didn't handle it... I have no idea what happened.
Before I painted I used a toothpick to clean what was left of the original paint out of the engraved areas I was planning to paint and then used isopropyl alcohol to clean off any dirt or grease & made sure to use a good enamel paint... I don't know what went wrong.
My question is this; can anyone tell me how to prep the bezel before painting? That's the one thing that I didn't see covered in any of the videos I watched.
I want to try this again but I don't want to do it every week.
Thank you in advance.
G.R.
The pictures are of before and after.

It's likely the paint isn't sticking to the numbers because they are polished just like the bezel. Are you hand painting over the numbers then wiping the paint while still wet? I'm afraid I don't have the skills or experience to advise you properly.

Yes, I hand-painted over the numbers then wiped the excess paint away. I prepped with alcohol which I thought would have assured the paint adhered permanently but apparently not lol
I've had this watch for several years and have never polished it, I don't know if the original owner did or if it came from Omega this way, honestly.

Thanks, Vibe I'll try to find Archers post. I did look on here to see if I could find an old thread about it but didn't have any luck.
P.S. Mine says hi back 😀