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Paladinpainter · 12-31-2014, 09:33 AM

Hi All,
Brownell's Blue Remover is mostly phosphoric acid. Dairy farmers use that same acid to clean their milking equipment. (light bulb!)

Tractor Supply has a phosphoric Acid Rinse for about $11/gallon.
I mixed some 1 to 3, acid to water. That concentration took 15 to 20 minutes to remove the blue and surface rust from an old Redfield sight. Not too bad for $2.75/ gallon. I'll probably use a more dilute mixture in the future.

Carry on,
John

12-31-2014, 09:33 AM	#1
Paladinpainter User Join Date: Nov 2009 Location: Vermont Posts: 64 Thanks: 14 Thanked 45 Times in 15 Posts	Cheap blue & rust remover Hi All, Brownell's Blue Remover is mostly phosphoric acid. Dairy farmers use that same acid to clean their milking equipment. (light bulb!) Tractor Supply has a phosphoric Acid Rinse for about $11/gallon. I mixed some 1 to 3, acid to water. That concentration took 15 to 20 minutes to remove the blue and surface rust from an old Redfield sight. Not too bad for $2.75/ gallon. I'll probably use a more dilute mixture in the future. Carry on, John