Asbestos in ceiling joint compound

I am installing some potlights and a dining room fixture (box) in my condo which is an older building - the ceiling is concrete-with wire mesh supported by rebar tied into 3" wide x 18" high steel joists. It is a very strong ceiling which has been smoothed and is in good repair. I have cut the potlight holes without a problem - then measured for the dining room fixture and tested to be sure I wasn't under a steel joist - and then cut a hole to insert the box. Unfortunately - I found a solid 1/4"" rebar in the middle of my hole. See: [ATTACH]27568[/ATTACH] My question is - can I just cut the re-bar (probably using either with a hack saw or a grinding wheel) OR should I avoid cutting it and move the hole over 2 inches? (which isn't as easy as it sounds). Also - I intend to make a frame out of 1/2" plywood with 2 pieces 4" wide (to fit through the hole) and about 10-12" in length forming the 2 legs of an "H" then stack another piece of wood on top to complete the "H". Then I will screw the box into the center of the "H". (I can glue the pieces together - and add a few drywall screws from underneath to hold it). Is this an acceptable way to secure the panel ? I am not planning to have a very heavy light fixture - maybe 10 - 15 lbs? Thanks for your help Robert

Doing my first remodel. The sheet rock company that my GC brought in hung, mudded and sanded. They left it ready for paint (or so they thought). So, I purchased Benjamin Moore primers and paints. After two coats of primer and two coats of paint we have remnants that look like this. Is this even in the realm of acceptable? How would you handle this with a GC? (Final payment has not been made).