That will require a "great deal" of maintenance, which
most folks are unable/unwilling to perform.

Anybody who has ever owned a boat can give you a detailed
history of teak.

You want it to stay "natural"...leave it indoors.

jtpr wrote:

I am buying some new teak lawn furniture. I want it to remain the
color it is, not turn grey. Is there a treatment I can use to
accomplish this?

Thanks,
Jim