Faraaidh of wudhu

Q: Will it be permissible to make masah on medical stockings for ladies suffering from varicose veins? It is very difficult to remove these stockings for wudhu.

Q: If we wipe our feet with wet hands and don’t actually wash them would it be sufficient to discharge the fard.

Q: I would just like to know if it is permissible to wear 'peel off nail polish' that you can put on after performing wudhu, and then peel off when you need to make your next wudhu, it peels off easily, also comes off in water. So would it be permissible to use and can you pray salaah with it?

س: "chin" لا أدري كيف هذه الكلمة في العربية و لكن أفهم معناها. هل هو جزء من الوجه، الذي يجب غسله في الوضوء؟

Q: If after washing the face for the 3rd time in wudhu, a beard hair fall out, should that place be washed again? Or if one washed his arm three times and thereafter a piece of skin on his arm peeled off, should the 'new' skin be washed again?

Q: Minuscule food parts in mouth after wudhu, does it affect the wudhu from being valid? i.e. they were floating in the mouth when rinsing mouth during wudhu. Moreover, what is the ruling on doing wudhu when one has food particles between one’s teeth?

Q: After wudhu and prayer one sees few (say 3 or 4) black minuscule grains of something (like a minuscule grain of powder or dust) under the nails, had it affect his wudhu?

Q: As nail polish nullifies wudhu, is it okay for one with onychophagia (nail biting disorder which is part of the OCD spectrum) to wear clear nail polish or bitter tasting nail polish to prevent her or himself from biting as it is damaging to the skin around the nail, cuticles, etc and puts the person at a risk of infection if they don't take steps to stop nail biting or is it still haram despite the health risk?

Q: I have on my feet a lot of half peeled off small skin pieces (probably from little fungal infections) mostly in the form of circles. Because of this the small peeled skins borders are hanging over the skin below i.e. there are two layers of skin. Is washing normally sufficient in order to make wudhu? Also sometimes, I have the same on my hand (2 or 3 or 4 very little circles). Is just washing normally enough?