Pam Morris wrote:

Two quickies...

1. Will the "age it with milk/yoghurt" trick work on stainless steel?

What would it stick to? The whole point of stainless is that it is?
You could try it though,..;-) Mebbe add some cornflower and try and
'roughen' the surface by distressing it.

2. Are there any Hibiscus that are fully hardy?

Fully not sure, but we have some that are close here in N London.. Not
sure what they are though.
//
Jim