POR-15 Metal Prep, Metal Etching Rust Neutralizer, Non-Flammable and Water-Based, 128 Fluid Ounces

If you have rust this works great. I had a rusted boat gas can and I put this in one night and left on my bench to clear the rust before I put new gas in the can but the next day this was all over the bench and the floor because it had eaten all the rust and left several holes in the bottom of the can because the rust was more extensive then I thought.

Used it works great. great quality

I bought this as recommended for use with the POR 15 sealant to prevent rust. I spent hours sanding and grinding the rust off the underside of a replacement truck bed I purchased for my Ford F5150 in preparation for the application of the POR 15 sealant and rust preventative which cost over $50 a quart. So when I watched some videos and all of them recommended the use of a metal etching solvent as the final pre-step, I felt it was in my best interest to make the purchase. Is this step required, heck I don't know but I was not about to cheap out after all that work. The process requires you to brush or spray this on and keep it wet for 20 minutes. Most video I saw people used a pump style sprayer for this but I choose to use a spray bottle to apply it since it was the quickest and easiest way for me to just purchase a good spray bottle. But it was just enough to cover the truck bed so keeping it wet for 20 minutes was a challenge with no extra spray after the initial application. So I covered it with plastic once it was sprayed to hopefully prevent it from evaporating too soon. It seemed to work, but 20 minutes? Not sure about that. But it definitely changed the appearance of the metal. However, even after rinsing it off, which is the final step, it left a white residue behind in spots which I was not sure about so I used a rag with some mineral spirits to wipe that away. It was not mentioned in the instructions on the bottle so I assume it was the thing to do and since mineral spirits contains no water I felt it would not hurt. I just did not make sense to me to paint over some powdery residue. In the end the project came out great and I am pretty confident in the work I did. Will the use of this product make a difference? It does make sense to remove as much loose rust as possible and creating a surface for a paint type product to adhere properly is something I have done many times so it makes sense. When I pull the old truck bed in the spring I plan to go through the same process on the truck frame below the bed. I will most likely try and find another cost effective etching solution so I can be sure to keep it wet as suggested. That would be my recommendation here - that is, get enough to keep it wet for the required 20 minutes. You can use the size of a 4 x 6.5 foot truck bed as an estimation measurement and decide to purchase this product or a more economical alternative - if there is one. Side Note: The process also calls for degreasing the surface before using the etching solvent. Again POR makes a product for this purpose, but in this case I just used some Purple Power degreaser which I have used for years when I needed a degreaser. I could not justify the purchase of the POR brand in this case. I did not see how it could be much different than any good degreaser that is applied and rinsed off in the same manner. Just something to consider.

Just what I needed works great!!!

As advertised