Cleaning a kettle..

[DirectDrive]

The 4/0 steel wool that Buckie mentioned is the key ingredient.
I have even scrubbed them dry with 4/0 and gotten good results.
Adding dish detergent/water ups the cleaning power.

Post some pics.

[BBQmedic]

The 4/0 steel wool that Buckie mentioned is the key ingredient.
I have even scrubbed them dry with 4/0 and gotten good results.
Adding dish detergent/water ups the cleaning power.

Post some pics.

Plus 1 I've used this method with great results

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[wrehfield]

Thanks, all. I'll get some 40 and give it a go. Appreciate the help.

[pbe gummi bear]

Thanks, all. I'll get some 40 and give it a go. Appreciate the help.

It's actually 0000 steel wool. Extra fine. Good luck!

[DirectDrive]

Thanks, all. I'll get some 40 and give it a go. Appreciate the help.

It's actually 0000 steel wool. Extra fine. Good luck!

I think he meant 4/0 = 4-aught = 0000

[pbe gummi bear]

Thanks, all. I'll get some 40 and give it a go. Appreciate the help.

It's actually 0000 steel wool. Extra fine. Good luck!

I think he meant 4/0 = 4-aught = 0000

Thanks, for the clarification! I just wanted to make sure that the OP wasn't looking for 40 (like sandpaper grit) in case they were unfamiliar.

[pbe gummi bear]

I'm glad I started this post so you guys could moon over Martha.

Sorry to threadjack but Martha is/was a babe:

[OGlenn]

I've had recent success cleaning bowls using oven cleaner AFTER warming the bowl up. Seems the oven cleaner works better that way. I set the bowl upside down onto a lit propane performer bowl and let the gas burner heat it up a bit.  You don't want it too warm or the cleaner will evaporate on contact. If the bowl you are cleaning is a performer bowl, it's obviously even easier!

For the outside of the kettle, after cleaning and drying, I've found spray-on stainless steel polish works well in the short term to get a great shine.

[AZ Monsoon]

for your grate, just build a big arse fire with regular wood in the kettle.

[AnakiMana]

Razor blade scraper tool. I couldn't believe how easy it was on one of mine.

Sent via smoke signals from my Weber kettle

Edit: oh wait, you mean the external part.