rust removal

Weber OneTouch (Silver?) 22.5" It's almost 7 years old which I think means I'm beyond warranty. Grates are really rusty. Tried oiling them last week. Already this rusty again. How do y'all care for your grates? Is it worth trying to restore these or should I just buy a new set (and maybe upgrade)?

Mods; have posted here for possible cooker care options... if there is a better area... feel free to have your way with it.:doh: Tackling the rusted firebox... found a slow-acting rust remover which might answer my quest; Evapo-rust Sounds like a useful option. Have already worked on the top...

I bought this New Braunfels for $40 on Craigslist, researched the brand and type of smoker on BBQ Brethren before I bought it. A little rusty, a lean, but some character, right? Over the next few weeks I browsed BBQ Brethren and got tips on getting rid of rust, rust converter, and what type...

Anyone have an easy method of removing rust from a grill grate and water pan. Tried a drill with wire metal brush attached and still cant get it all off. This is a home made smoker I aquired from a family friend so the size is not standard and cant find replacement grates.