I renovated (rebuilt from pretty much scratch) our garden bench two
years ago and it turned out well with really rich colouring in the
Sapele slats.

Sunlight, rain and overwintering have turned the wood grey on the
exposed surfaces but left the back of it that was against a wall, and
the under-surface of the seat, still a good colour.

So how do I get the colour back? A quick wipe over with the same Teak
Oil as I used last year isn't bringing it back.

--
Frank