I read Toni's post on sandpaper belts and did not want to hijack the subject but Tim mentioned how long he used belts till they were smooth.
This has prompted me to ask a question here that has bugged me ever since i got my hand on a piece of sandpaper errr well not quiet but almost.
We learn at some point about going through the grits sizes when preparing an item for finshing.
So how does one decide on when the paper is done.
This subject has come up for me with the sharpening method using sandpaper.
I find especially the water paper seems to propagate through the grit sizes on its own. So say you start with a piece that is 220, i find as it wears it changes to higher order grits, so much so that when taking the next leap up its almost like you start again.
So what to do next time discard the piece cause it aint 220 anymore.
Alternative is you sanding a wooden item and you have you various grits, when do you stop and move on and then do you keep the previous piece and assume its good for the same purpose next time round.
I find i am either one extreme or the next. Either i dont give up on one piece till i have finished off the grit on it or i waste sandpaper cause i am too afraid to wreck the next item i finish by using old paper that i dont know where i am with.
What it boils down to is i dont have a clue about how to use sandpaper properly such that i reach a happy medium.
Any help out there for some practical remedy.