There are levels of toxicity. For some old paints, allowing the dust or run-off from pressure washing to touch the ground would be violating some regulation. Re

There are levels of toxicity. For some old paints, allowing the dust or run-off from pressure washing to touch the ground would be violating some regulation. Removing those old paints is more complicated. They need to be removed completely and cleanly, so sanding is a bad choice. This isn't the case for any paint now purchasable, but most still contain biocides that you want to avoid for your own health when cleaning or sanding.