On 7/18/2016 2:28 PM, Tim+ wrote:
GB wrote:
On 18/07/2016 13:48, The Natural Philosopher wrote:
On 18/07/16 12:57, GB wrote:
We have a very old Kenwood mixer, with aluminium beaters. We
unfortunately put them in the dishwasher, and they are now covered in a
soft black deposit. What's the best way to get that off and if possible
restore the finish?
AlO2?
possibly strong caustic, better an acid of some sort...
vinegar/lemon juice rhubarb or maybe a de-scaler?

I tried vinegar, but that had no effect.

The black stuff does come off with a scourer, but now that the original
shiny finish has gone, it discolours very easily.

Maybe time to try a spot of DIY anodising or find a firm that'll do it, or,
look out for a replacement on eBay?

Tim

Are we talking about the K beater or the whisk, I wonder?

The K beater is a casting, I'm not sure what sort of alloy. Perhaps it's
not actually aluminium.

The way to get the polish back might be to polish it with a reasonably
powerful buffing wheel and a standard polishing compound. You might be
able to use a dremel on the inside surfaces. It all depends on how
pitted the surface has become as to how long it would take.

I'm pretty sure my K beater survives a dishwasher.