I'm hoping to use some scrap structural steel pipes and plates to build a large BBQ/Smoker, but they're all pretty heavily rusted. I've seen people in tutorials use both wire wheels and preparation discs to do this, but none have explained their choice.
They all seem similarly priced and all have the same description of their function! Ideally I'd like to select the one which least marks the underlying steel.
I'm currently choosing between just about everything in this category: http://www.screwfix.com/c/tools/cleaning-preparation/cat5990034