removing lenses-A body ralley dashes

How do you remove the lenses and gauge from a A body Ralley Dash. They look like they are plastic welded or glued on the back with a
plastic stud type of thing?..

They were originally studs the lenses slipped over and then the studs were melted, the same thing they do today to assemble an all-plastic door panel from many separate molded sections. Bust the melted over stud material carefully, leaving just a nib to sit the lenses back on and then glue them back in place. Devcon / Permatex makes an excellent Plastic Welder cement, 2 part, stinks awful but really works. Fixed many door panels, grills with the stuff.

Thank you sixpack

I used a soldering iron. If you get the temperature just right, and pull up on the lens a bit, the plastic will conform to the hole and leave you with a stud to remelt. That's how I did mine anyway.....