Cool ideas gang
Here’s a wild one,when you have a white ring under your finish,put a small amount of naphtha on the affected area and then light it with a lighter or match and watch
the ring go away,of course you want to use a very small amount,just enough to warm up the area. If that’s too scary just use some blo or tung oil on a cloth and then apply a clothes iron without steam and iron the wet cloth over the white spot.

woodworking classes, custom furniture maker