DERUSTER - Alkaline Spray Rust Remover for Metal, Ceramics, Mineral Surfaces, Concrete, Buildings, Tools & More. Suitable as Bike, Car Rust Remover, Patio Rust Remover - 500ml

Works well and easy to use. Liquid turns purple/red when sprayed on rusty surface which is normal.

Depends on how rusty your stuff is. If light, this is brilliant, if heavy, one bottle may not be enough

Really pleased - easy peasy - great result. I wonder if it's safe on UPVC window sill???

It's OK, but not easy to use, unless what you are working on is a flat surface; if it's a rounded object, it's very liquidy/runny!

Great product, does the job. It removed the rust from my porcelain patio. As soon applied the rust changed it's colour to purple, 2-5 min after I was easily able to brush off and clean my patio.

I used this on some old Engineers Squares that were from a family member so I wire brushed the squares gently removed the rust and there were a few stains left and I didn’t want to remove metal because it will make the squares out of true (inaccurate) and they are ground on special grinding machines to be trued so sanding them is a big no no, so I decided to use this and followed the instructions and it immediately turned purple indication corrosion was happening and the dark spots got darker and the rust came back 5 times as worse as it was when I started. I’m just throwing them away now and I’m going to buy some expensive new squares. My point is this says you can use it on tools to remove rust I followed the instructions to the word and now it’s damaged my property so please don’t use this on bare metal you can take my review as negative, I’m so upset about this.

Amazing! Spray on and within minutes it has taken the stains out my porcelain patio!

May need more than one go