Look for a lead abatement company. The surface test kits only test the surface. A dedicated company should have a X-ray device that can determine if there is lead that has been painted over. Also get soil tests since houses with lead paint will have been scraped and that leads to lead going into the soil around the house.
> A dedicated company should have a X-ray device that can determine if there is lead that has been painted over.
Isn't the risk of lead paint only relevant if it's exposed? So you should test any visible layer and any layer that later becomes visible, but deeply nested layers don't matter so much.
