I have worked with all types...oh wait...we are talking about WOODworking.
Anyway I have also worked with a lot of "wood" types too and Bawanna is correct re: the hazards. Anytime I sand a "hardwood", I wear a respirator designed for that size of dust particles (removable filters). I also wear this when finishing wood with lacquers or polyurethanes but not oil and wax.
Essentially, the small fibers will cling to the scilia (sp) in your lungs and screw with your respiratory system...permanently. Some woods are down right deadly if enough material is inhaled (Pau Ferro, Andaman Island Padouk, Ebony, Purple Heart, Zebra Wood (look at how it striped their hides...
) so better to be safe than sorry.
Wearing "Nitrile" gloves is a good idea but they make several different grades. The hospital grade is very strong and much more tear resistant than most. Vinyl, PVC or latex are crap IMHO as they disintegrate easily.
I would follow Bawanna's directions re: the grooving and send back to him if you want the checkering replaced. I would personally leave it off of the grooved area like most 1911 grooved grips I have seen...but that is just me and some say I am weird.