Restoring corroded hob plates

Originally Posted by Flubflow

You will never in a month of sundays take off 1mm with emery cloth. You will be extremely lucky even to take off 0.1mm and even then not evenly.
Emery is only good for removing loose surface rust. The grinding paste and oilstone method is better for getting rid of slightly deeper corrosion and keeping the surface truly flat but even that has its limits when you have deep pitting.

Aha ... now, grinding paste and oilstone is something the Aga DIY website I found was talking about. Do you know any more about that, such as where I would get the kit? Is it something I might find in B&Q?

When I said a millimetre, by the way, what I really meant was 'just a little bit' ... I wasn't planning to scientifically remove a mm of the surface. I know it'd take forever ...

[Flubflow]

Originally Posted by Chris T

Aha ... now, grinding paste and oilstone is something the Aga DIY website I found was talking about. Do you know any more about that, such as where I would get the kit? Is it something I might find in B&Q?

When I said a millimetre, by the way, what I really meant was 'just a little bit' ... I wasn't planning to scientifically remove a mm of the surface. I know it'd take forever ...

Grinding paste you can get from an autoparts shop (valve grinding paste, usually you get course and fine grades in two halfs of a tin). The tins tend to be small so you might need a couple at least.
The oilstone I'm not sure. I would think somewhere like Machine Mart (they may have grinding paste there too, in larger tins). You don't want one that's too small because the idea is to grind the hob plate flat (for best thermal contact with your pan of curry! assuming of course you are using those flat thick bottomed pans which you're supposed to on a flat hob plate).
Oh, and you grind in a figure of 8 pattern rather than back'n'forth or circular.
EDIT: Those common little oilstones about 1" x 3" are pretty useless for this job. You probably want something the size of a beermat.

[altis]

Oil-based whetstones are so old hat these days. You could try a diamond based one from DMT or similar - they just need a little water as lubricant. The extra coarse (black) ones don't half shift some metal.

http://www.dmtsharp.com/

[paulyoung666]

i wounder if you could get them machined back to a good surface , ok so i was only guessing

[Flubflow]

Originally Posted by paulyoung666

i wounder if you could get them machined back to a good surface , ok so i was only guessing

I too mentioned that earlier. Saves a lot of arm work.

[paulyoung666]

Originally Posted by Flubflow

I too mentioned that earlier. Saves a lot of arm work.

sorry i missed that , i will go off and myself quietly