Ian Jackson used his keyboard to write :
I haven't been to the local tip since they started charging (in my mind, for
what I have already paid for in a £3k+ council tax).

However, some years ago I did take a few partially-full tins of old paint,
and was told just to lob them in the skip for ferrous metals.

A local charity shop always has around a couple of dozen part used tins
of paint on one of there shelves. Usually it is top quality commercial
grade paints and with delivery labels in place, as if it has been
donated by a professional decorating company.

Me, I keep paint for a few years after decorating - you never know when
you might need to do some patching to cover damage, so I write on the
tins where the paint was used. My stored tins came in just a couple of
weeks ago.