Undrdog The Purps FAQ - Iron, Rust & Fallout Remover

Why do I need to remove iron from my vehicle?

First off, rust is unsightly. But what’s even more important - it causes degradation. If left unremedied, rust damage may eventually make its way to the frame of your car, creating serious structural damage that you may not be able to repair.

Should I dilute The Purps when using it?

We do not recommend it because this method is not going to be more cost-effective. You may end up with a surface that is not properly decontaminated, which will ultimately mean you will need to reapply the product. 

Can I use The Purps on Gel Coat?

Yes, you can. However, we always recommend you test the product on a small, inconspicuous spot first. 

Is it okay if The Purps runs on my glass?

The Purps is designed for use on paint and wheels, so it’s best to avoid getting in on glass. 

Can I use The Purps on carbon fiber wheels?


Is The Purps safe to use on all types of rims?

Most. The only type you should be careful with is chrome because The Purps can cause damage and discoloration. Conduct a small surface test first to determine if it is safe to use. Do not allow the product to dry on any surface of your vehicle.

Will The Purps take off the coating from my car?

No. The Purps is safe to use on coated vehicles. 

Can I use Purps on satin and matte finishes?


What is the shelf life of The Purps?

If stored properly, The Purps can last up to a year.


Why has The Purps turned yellowish?

Most iron removers turn yellow when stored longer, due to the active ingredients in them. This does not affect the product’s quality. 

Do I really need to wear gloves and proper safety gear?

Yes, when working with any chemical including ours you should wear gloves and respiratory wear. No two bodies are alike and it is better to be safe than sorry.