I'd love to hear your suggestions on what you guys use for this stuff...Restoring a pump now and running into a couple things...

The site glass is full of old fuel residue, I've been soaking it in parts cleaner for a couple weeks now, alot came off but still alot left on, any suggestions? I know I can purchase reproductions, trying to keep it original if possible...

Also when you run into ad glass that has been painted over, what is the best product to use for removing that without scratching or harming the glass?

Thanks in advance, I appreciate any suggestions!

Fuel Residue.JPG
Old Fuel Residue

Painted Ad Glass.JPG
Painted Ad Glass