AHHHHHH!!! Don't use 60 or 80 grit!!! Please don't tell me you used coarse sandpaper on those cabinets. I just read your latest post. Wow, that changes the picture!!! I was wondering yesterday when you were going to do this work, whether it could be done in the summer when you had time and not be bothered. How do they expect you to do anything in 30-45 minute time blocks? Okay, emergengy stratagy!...Ready?! Don't sand or strip the cabinets! Have the kids clean the cabinets with a solution of TSP in water, using rags. Don't let them soak the cabinets, just clean off the grime. Next, if there are scratches or dents, use a clothes iron and a damp rag...lay the damp rag on the scratch or dent and apply the hot iron over it. The steam will puff up the scratch or dent. Wait til the area is dry, then sand the area with 120, then 150 sand paper. Lightly sand all the cabinets with 150 grit...MAKE SURE THEY GO WITH THE GRAIN!!! Next, apply Zinsser sanding sealer to all surfaces. This dries really fast and is runny, so make sure they apply it lightly and brush it out. Keep checking for drips and runs and brush them out. Once that is dry, use 320 or 440 wet and dry sandpaper and lightly scuff all areas. Use dry sponges as sanding blocks with this sandpaper. All they are to do is knock off the dust specks, not sand through the sealer coat. Now you are ready for finish coats. Kids and applying varnish don't mix, especially wanna-be rappers. I would suggest using Minwax Wipe-on Poly. Pay attention to the smell, ventilate if necessary. Make each kid wear rubber gloves, give them a bowl type container with about a cup of poly in it and a rag, have them soak a part of the rag only and wipe it on and spread it. This method is pretty fool proof and kids can do a good job at it. If you need a color it gets way more complicated. You could use Polyshades by Minwax and wipe that on, but it won't apply as well and may not be even. Call the Minwax help # and ask about adding color to the wipe-on Poly. Anyway, the next day you can re-coat. and the next day do a light scuff with 440 again and dust off the surfaces. The next day give everything a third coat. That should be good. You should be able to knock it out by the end of the semester this way.