I re-processed my doors, and got to the third layer of stain. Unbeknownst to me,I had terrible sanding marks in my doors which I can see clearly through the third. Is there anyway to fix this without having to completely take off the stains i.e start all over again??
It looks like you neither sanded with the grain or used a fine enough sandpaper in order to prepare for staining. I think you have to go sand it down and start over. Those likely would have been visible before staining.