Rehabbing a neglected performer

I've recently rescued a Weber Performer that has been sitting outside in the fog and rain for a few years. Fortunately, it was under a cover, so it's in pretty good shape. There was some ash in the kettle, so there's a lot of rust on the grates, and some in the kettle itself. Perhaps the biggest concern is a ring of rust along the bottom of the kettle lid, where it sits on the lower rim.

I know a lot of the Brethren have experience with rehabbing CL finds, so I was hoping for guidance on a few points:

1) What's the best way to clean up heavily rusted grill and charcoal grates? Should I use cleaners? Or just scrub away? I think some people let them soak in various cleaners and/or water. Any ideas?

2) Is there anything I can do about the rust on the lid that won't damage the enamel?

3) Is there anything I can/should do about the rust inside the kettle? It's by no means rusting through, there are just a few orange spots.

Thanks in advance!

shazam said:

i use a product you should be able to find at home depot called cleen strip phosphoric prep and etch to remove rust. $15/gal. good for old rusty tools also. not sure how it would affect the porcelain coating on the lid and bowl though. you might try leaving a rag soaked in some on a small test area. just till the rust is gone. same for tools. sort of leaves a parkerized type finish and helps protect from further rust.

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Thanks for the advice. Is that going to be food safe on the cooking grate?