This page is a permanent link to the reply below and its nested replies. See all post replies »
Wrap the note in plastic. Seal it.
Take it down to the foundations, wet the concrete, use rubber gloves, mix some cement, cover the letter in the cement mix, and smooth it on to the foundation. Make sure the shape looks like a part of the original. (Pre-soaking the foundation is important, or it won't stick.)
Take it down to the foundations, wet the concrete, use rubber gloves, mix some cement, cover the letter in the cement mix, and smooth it on to the foundation. Make sure the shape looks like a part of the original. (Pre-soaking the foundation is important, or it won't stick.)