On Thu, 11 Oct 2018 08:46:35 -0400, Rusty
wrote:

On 10/10/2018 10:05 PM, wrote:
On Wed, 10 Oct 2018 17:29:24 -0700, George P
wrote:

What's a cheap but permanent way to attach one of those flimsy steel no
trespassing signs on a solid concrete outside stucco retaining wall?

Don't.
Stick a steel sign-post in the ground instead.
John T.


Agreed, that way you won't get rust streaks down the stucco.

True. But the OP wants the sign on the retaining wall