I understand pretty much the importance of gloves, ventilation, respirators and eye protection but the wikipedia entry for Bisphemol A makes for an overwhelmingly long read scattered with some quite alarming comments.
So id like to clear up a few things.

Gloves - i wear gloves to protect myself from the sticky stuff and sanding dust but should i be wearing them when i demold? ie does the blush contain bisphemol A or anything else i should be concerned about.

Eye protection - I wear glasses when i work and back them up with safety glasses when im cutting or machining compotes. However is it the fumes i should be worrying about and hence should be wearing goggles (even un-vented goggles ?)? I did do this for a while but found they steamed up so much as to cause more danger by blinding me. If i should put them back on how do i stop them from steaming up?

Respirators and ventilation - i work i n a shed so when im wet laying i leave a window open and have an extractor ( bathroom ) drawing from a channel drilled out along its length that runs along the length of my bench about 18 inches above it. I wear a 3m respirator with 6054 filters (+amonia) that my local h+S supplier tells me are the best for the job. I store the filters in zip seal bags between jobs ... Does this seem like adequate precaution.. Are these the best filters for the job ? Should i run a mile if i get an exotherm ?

Dust - use separate dust filters when sanding and machining. That i also store in zip sael bags

As a rule of thumb: The better the product, the worse it is for you.
In other words, what makes a resin, lacquer or coating a "good product" is how well it reacts or bonds to itself and other things. Those things can also be your skin or lungs. And if its in your lungs, its in your blood and well..... you get the picture.

So yea, epoxies, urethanes, polyurethanes, etc all contain faking HORRIBLE stuff. It is literally poison. And its not the Bisphenol A you should really be worrying about. Bisphenol A is in the primary polymer but its not as toxic as whats in the hardeners and catalysts. Thats whats really bad. Amines in epoxies and isocyanates in polyurethanes. Isocyanates are not far off sarin, mustard gas and cyanide. Only a handful of chemicals known to man are more toxic than those. And it's surprising that you can just buy this stuff from a shop no problem at all. If you were an evil bastard, you could get a load of PU hardener and pour it into a building's AC system, you could kill a few hundred people.

And don't think Polyester is that safe either. Styrene is an irritant and a depressant. Ok, not the end of the world. But MEKP..... if it accidentally splashes you in your eyes when you pour it into the cup- youre blind for life.