I have been using lead enamels from Thompson with excellent results,
replenishing with the lead free only when unable to get the lead
bearing ones. They are perfectly safe to use. However, do use a dust
mask—for both the lead bearing and the lead free.
I prefer the lead bearing as most of the colors I use are not
available in the lead free. However, I do use the lead free fluxes
under the lead bearing as they are excellent.
You are fortunate to be able to get the lead bearing ones, so don’t
hesitate to do so. They are safe, and a pleasure to work with. Alma