danger of lead paint under a lime plaster

I salvaged a load of cinder blocks which, to my dismay, have some lead paint on them. The lead paint is in a very thin, tightly stuck layer. If I used them in a building project and used a think lime plaster over them, would that be safe? Or should I try to get rid of them somehow?

The wall would be on an outbuilding, and the lead would be facing out, covered by the exterior plaster, and under the protection of a porch roof.

Gilbert Fritz : Basically everyone in the U.S. is supposed to live under the same codes. The only real difference is in the enforcement !

The code says that old lead paint must be encapsulated. One permissible treatment would be where you have a house with an exterior
paint containing lead, a legal and permissible treatment plan is to cover it up with crappy Vinyl Siding. Your plan clearly is more in
compliance with the spirit of the law ! If It can not be eaten or breathed in It can not hurt you !

I would go for a few thin coats rather than a thick coat ! Big AL

That sounds like a good plan, but check to ensure that the lime can be absorbed into the block by spraying with water. If the water doesn't soak right in, you will have trouble getting the lime to bond well. If this is the case, then you will have to remove the paint and things can get ugly. I usually set up a containment tent with plastic sheeting and lightly pet the surface with a diamond wheel while wearing proper PPE of course. Good Luck, I love what you are doing!