"Stuart Fields" wrote

Second to Jim. Zemlock helicopters at Chino showed me one of those
Insecticide sprayers used to clean up his D model Bell 47, which if they
could ever find a crop that could use engine oil, would find it's niche.
No spray booms required. The sprayer worked like it was designed for the
task.

Actually, many (most) garden sprayers will not last long using any
petro-chemicals. You can get one from a concrete supply company that is
designed to spray concrete post treatment, that is petrochemical proof, or
find a sprayer for treating decks with waterproofing at a lumber supply
house.
--
Jim in NC