WD-40 contains oxalic acid, thats why it takes rust off so well.
It may not have that listed on the can. dunno'
Use then rinse well and its fine.
~..~..~.. ><((((º>
Things done at the last possible minute are done with the greatest possible information. Procrastination is, therefore, the most efficient means of doing things.
Rust o leum paints "used to" use menhaden oil - dunno if they still do, have not read the back of a can lately. Something my Dad pointed out to me a very long time ago....