Primarily Petroliana Shop Talk Forums Shop Talk Petroliana Forums General Petroliana Discussion Best way to remove lens screws from milkglass globe?

I just bought an original Sinclair HC globe and it still has the lenses attached with the original screws which are stuck. Two of the little glass stubs where the screw holes are, are chipped and I want to avoid damaging the body any further, so I am curious as to how I should proceed. Thanks in advance.

Mark