It seems to be difficult to post pics here, I have a 7+ year old Nokia smartphone that becomes more uncooperative in function per week so I dont even try, and it seems my Flickr page is frozen.
Anyway it would be great to see a photo, not to "diagnose" but abrasions often do have identifiable markers. Especially if you can get close shots.
Frogs can efficiently and quickly heal from minor abrasions on the dorsum if not kept too cold and wet.
Environment photos and descriptions provide history and etiology clues for other issues.
If they are mild abrasions and are resolving it is best not to tinker around with corneum softening antibiotic ointments or solutions. Once there is a generated layer of new cells at the site, it is best to leave the frogs own healing mechanisms alone.
I would not stress them by quarantining them if they are mild abrasions. This may be contrary to others respectable advice.
I am interested in seeing photos and I am sure others are too, and hope indeed the marks you see are not illness. If they are not raised but flat, and in certain locations (ie; the "roof" of the frog) that can be a good albeit basic sign.