I recently sanded out the floorbaords on my car. Well I’ve got 3 gallons of rust encapsulator, is there any way I can open it and re seal it without it going bad? or once its opened it all needs to be used up at once? Or I’ve got about 8 containers of heavy duty anti rust, some of the rust spots in the floor wouldn’t sand out, can I use the anti rust like encapsulator and put it on the floor stopping the rust? Can anti rust even be used on an interior?