On 23/08/19 14:39, David wrote:

Worth considering using some strong plastic sheeting to rest the BBQ bits
on whilst you are treating them. Acid tends to rot most things it comes in
contact with, especially clothing.

It's not the rotting which would concern me - it's the splashing of the
ferric phosphate (formed when the rust reacts with the phosphoric acid).
Any porous surface, including clothing, wood, stone, etc will get
stained and such stains will never be able to be removed completely.

--

Jeff