When hooking up a trailer, instead of connecting the trailer's safety chains directly to the hook in front of it on the vehicle, cross them. Put the chain from the right side of the tongue to the hook on the left side of the hitch. Likewise, put the other chain onto the hook on the right side of the hitch. That way, should the trailer come unhitched, the tongue and coupler will land on the crossed chains instead of skidding on the road.
Lead-based paint is usually not a hazard if it is in good consition, and it is not an impact or friction surface, like a window. It is defined by the federal government as paint with lead levels greater that or equal to 1.0 milligram per square centimeter, or more than .5% by weight.