Timing problem

Just soaked a complete carb in pine-sol. I was amazed how clean it came. 50/50 with water. Weaker mix longer soak.

I had a fuel tank off a 27 studebaker,2" of rubber like material in the tank. Was a disaster. Someone suggested aviation gas. I got some. Didnt touch it,poured gas out and was still clear. Scraped with sticks and washed it repeatedly. Acetone did cut it. Perhaps naptha?
Strapped tank to my tractor wheel and jacked it off the ground. Threw some chain in and let it roll for 30 minutes. Cleaned it nice.

If you can get a tank and sender for less than 200, why you screwin around? I wouldnt. My time is becoming more precious the older i get.