tryna figure out if you can refill either of these, I know w the wite eout pen you'd need a good mixture and it seems like it'll come off but im not sure about the sharpie ones
on some whiteout pens u can unscrew the top and pour something in. the sharpie ones i think you have to yank the top off with pliers or something because its glued on.
It will be complete shit on the wite out if you use an ink, the ink will leak right out so pop off the top of the wite out with a knife and fill it with a paint (Rust bucket paint is rack able and Permanent)