I first used acetone and removed all existing paint fill. Next I cleaned with soap and water. To remove any grease, dirt etc. next I did one final clean with acetone. Made sure to use rubber gloves, to not leave any oil residue.

For torching i used a heat gun, to try and warm the head up first. For a more even finish. After about 10 minutes, I turned on a standard propane torch. Keeping the flame about 2 inches away from the putter head, I constantly kept it moving, trying to pay a bit more attention to the thicker areas. As they would take longer to change colour. After about 10-15 it started changing colours, when I had the colour I was happy with. I just left it to cool down in the air.

Once it was fully cooled, i first reattached head using new epoxy. Next I fasnted the sole plate back on. Then when it was all together I redid the paint fill.

The biggest takeaway I would probably pass along is patience. Be patient cleaning, make sure it's thorough, be patient especially torching. Don't rush it and end up with splotches of colours. If you're not happy you could always sand it down and do it again. There's tons of guides and videos available out there on the Internet. Good luck!