i clean my father inlaws truck. i had his saddle tanks looking real good but he said he spilled some antifreeze on it. not sure thats what it is, but i cant get it out
products that i’ve used include strikeforce, some degreasers, and an acid for polished aluminum (its a blend of phosphoric and sulfuric).
Did you try the standard two step aluminum brightening process?
Apply a low ph acid - i use an aluminum brightener which is hydroflouric acid based, then follow up immediately with a high ph detergent like a degreaser or something like Brown Derby, then rinse with some pressure. This should re-brighten the aluminum and remove the etching in the process
Tim,
That tank is already hammered from acidizing already, all the polish is gone. That is you no longer have a mirrored finish. So, just get yourself a good aluminum brightener and it should rip it right off. Something that has a some HF in it will work great. Be careful with the HF.
I doubt you will have much luck with the milder products for polished aluminum.
This is a sheet that I found quite a while ago, that I think everyone who handles hydrofluoric acid should print out and keep in the truck. You’d be surprised how many emergency room doctors have never heard of HF, much less have a clue how to treat exposure.
HF is a great material, but you’ve got to respect it.HF_medical_book.pdf (33.1 KB)
Thanks for the tips guys. I know of hf, being a carpet cleaner, I use it for rust removal. It makes me nervous sprayin it into the open air. Do you have any tips for application?
If your really really worried I would find another Aluminum Brightener with a strong phosphoric base. It will work a little slower but you will get the results you want. We use a HF / Phosphoric blend in our wash bay every day. You just need to be careful. Get yourself a product you feel comfortable using.
No problem, just making sure you are comfortable with using a product.
It is pretty simple. When you find a product you think will work just follow the directions. I can speak to what we use in our wash bay. For cleaning gas tanks like that one we usually use a pump up sprayer, let it stand for 30 seconds to 2 minutes, then power wash it with our truck wash soap and rinse.
We sell some chems for aluminum brightening but I don’t think you want to pay shipping cost to get it to you there in MA. Especially, for such a small job.