Thanks for the advice, I'll phone some chemical suppliersa tomorrow.

Just a few more questions!

I'm reworking my 4 doors and have ALL the glass and hardware out. I was planning to apply the acid with a spray bottle to treat the door inside surfaces.

- Do I need to remove all oil from the surfaces before the acid spray?

- Is a water rinse sufficient, or should I use a baking soda spray to neutralize first?

Thanks!