Question 1

How does one prepare and apply this product?  Is the water/product mixture paste-like or watery?

Accepted Answer

Dissolve it in hot water.  Will be watery. Scrub hot solution in with a brush.  Then make sure you clean it up with water after don’t leave any residue.

Question 2

Can you use this on a metal rusted roof?

Accepted Answer

I have used it on metal corrosion on our fleet of sailboats for years and have been very pleased with the results.  I have tried other products and found that almost nothing else works.  If you plan to repaint after removing the rust/corrosion you will need to make sure your wash the surface several times with fresh water.  For stubborn areas, you may need to do a little wet sanding with very fine sandpaper (300 GRIT or higher).  If you have any wood in the area that you don't want bleached (e.g. a wood deck or stairs) you should cover it and then hose it down as soon as possible if any of the oxalic drips on it.

Question 3

Is this a good product to use for removing rust stains on pavers and travertine?  What is the mix ratio?

Accepted Answer

I have successfully used about a tablespoon per quart of water for removing paver/concrete rust stains.

Question 4

Can a mix be used to remove rust from inside a fuel tank? I would  think it would be more gentle and less likely to produce pin holes .

Accepted Answer

Yes. It works well. I have used it in a Ural gas tank, which was stored for 13 long years with bad gas. This stuff in hot water removes all rust pitting from inside the tank. I had to use baking soda mixture to neutralize the process.
I then used a pint can of the Red Kote to line the tank. Great results.

% Assay of Chemical(s)	99.6
ASIN	B0147GM7CQ
Best Sellers Rank	#105,077 in Health ( See Top 100 in Health ) #1,486 in All-Purpose Household Cleaners
Brand Name	Florida Laboratories
Container Type	Bag
Customer Reviews	4.7 4.7 out of 5 stars (2,170)
Item Form	Powder
Item Weight	0.9 Kilograms
Manufacturer	Florida Laboratories
Molecular Weight	36.46
Part Number	oxl5
UPC	741296770580
Unit Count	946.35 Milliliters
Volume	907.18 Milliliters

Florida Laboratories OXALIC Acid 99.6% 2 Lb. Deck, Crystals, Metal Cleaning- Rust Removal, Wood Stain Remover and More!

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