You're correct, John. Heavy metals are rarely tested.
Several years ago, a friend of mine sold his body shop and within months lost most of his sight. In searching for a cause they detected extremely high levels of metals in his system, most notably lead. Turns out that the probable cause is Lyme not the metals, but it got me thinking. Next time I went for my blood I checked the box for lead testing. My doctor questioned why he had requested it. I came clean and explained that I had checked the box and why. At least we now have a base line to go by. That lead him to question other patients like me and also an EPA employee who is also one of his patients.
30 years of spraying all of the chemicals in automotive paint can take its toll on your body. Luckily for me everything is OK. My dad had required us to use a fresh air supplied hood and full tyvek suits after the Bhopal India Union Carbide incident. Those same polyisocyanates are a big additive in flex agent back then and in the urethanes we spray today.