what to do about Parker gun?

[Opening Day]

For the barrels try Hoppes 9 wipe them down and let them sit for a day or two then wipe down again and use some OOOO steel wool with the Hoppes and that will take some of the grime off, never heard of the vinegar idea. Ballistol is a good product for both metal and wood but if you want to clean the wood try some Murphy's oil soap on the dry side and that should take most of the grim out and then some wax. Whatever you do go slowly..