Patio Paint brand makes a very nice "leaf" green. I am almost out and can't find any at our local stores (Michaels,JoAnn's,WalMart) Any craft paint will work good. Some people seal them with a outdoor sealer some don't. I do because I am selling some of my pieces. The say to reseal every year to best preserve the color. Concrete/sand mix will give you the most strength and detail from your mold. The place you go your mold from has very nice molds. I have bought many from them. Paws

It'll be fine. Debris wouldn't flow off the shelf underwater unless the slope was huge anyways, and the PV3 pushes the water across the shelf with considerable force, but the plaster guys will get it more level.

I have an entire bed of Mexican petunias they are pink, purple and light blue, they are beautiful and thrive here in the Texas heat, they get lots of sun. I have Lantana in the blazing heat and sun and it's growing like mad. I have beautiful blue Sweet Dreams Duranta it does well here. Also the purple with pink flowers wandering jew plants do well. I have lots of cannas in various colors.

I was just remembering back to what my dad gave my grandparents for their 60th wedding anniversary. This is not traditional, but my grandparents were not traditional type people. Apparently my grandfather had always wanted a huge bell. My dad found one that was two or three feet...not sure... at a flea market. My grandfather mounted that thing on a tall stand in front of their house. My grandmother loved it. My grandparents lived on five acres with trees and several buildings. My grandfather was the type of guy that always had a project and was out and about doing stuff. My grandmother had her own projects and didn't always feel like tracking down my grandfather. My grandmother rang that bell when she wanted my grandfather back up at the house. They both thought that was great. My dad didn't do this, but that gift would have gone along great with a little something that made a pun about ringing each other's bell. A lot of people including myself love bird feeders, garden art, etc. You could do something like a big metal wind spinner and make a joke off of still going after all of these years. I think one of the sun/moon faces might be cute too. You could make a reference to the two of them working as a couple or something.