Hello Just scrubbing does not seam to do the best job. :-( What is the best and painless way? A 50/50 mix of vinegar and water helps with some of the rust. How about a pressure wash, then a wire wheel on the drill driver and then some electrolysis to remove rust? or A good sand blasting? Sandblasting works well on cast iron grates but not ones with a porcelain coating. Can Media blasting SS grates can leave a rough profile and make the crevices more prone to rusting? Here is a vid on Power wash & Electrolysis Is Vapor Honing Tchnology just the best way to go here??? How about a DIY wet blaster from aN inexpensive HF sandblasted turned down to 40 PSI & pressure washer! This looks good! Especially for washing a metal Boat or dingy!! What do you do?