EGR valve - hillbilly fix

[Ripsaw]

Hi guys,
Back again with problems on the wife's 91 silverado PU with the 305 that I fixed last year. Of course when i replaced every single thing under the hood, I didn't replace the EGR valve. Found the testing procedures and performed them, and the valve is failing to seat off and is sucking air from vacuum test at the valve.

So my question is this.

Has anyone ever tried to use Hopps bore solvent for gun cleaning and an eyedropper to apply it to the shaft of the valve, let it run down and penetrate in there, and work the valve open and closed to clean it off to make it seat closed ?

Is there a seat like a valve in there that matches the shaft ?

Do you think this may help or will it harm something else in there ?

It is after all, used for removing carbon residue in guns.

Comments and opinions needed and welcomed. That's right, always short on cash and need another way to fix it if possible....Thanks for any help...Rip