RE: MEK vs MEKP
MEKP - Methyl Ethyl Ketone Peroxide - This is one if the most powerful carcinogenics known to man. If you play with this stuff then you WILL get a cancer and die. Even breathing the vapour will kill you (eventually). It will also cause blindness if ANY quantity gets into your eye and is not flushed out within 4 seconds.
MEK - Methyl Ethyl Ketone - This is also a powerful carcinogenic.The electronic assembly house that I use has banned the presence of MEK on their premises. Many, many manufacturing companies that I deal with have banned MEK. Make no mistake - MEK WILL kill you.
I use these products in small quantities as a modeller. My lifetime exposure rate is very low and I wear the correct protective equipment. Gloves must be of the correct type, designed for MEK - it will go straight through rubber surgical gloves. When mixing and spraying paints using MEK (polyurethanes) I use an external air fed hood (like a helmet with an air regulator). These hoods are not expensive - I paid AUD250 for mine (about USD185) - better than being dead.