DIY Concrete Leaf Bird Bath DIY Concrete Leaf Bird Bath - love this idea! Those leaves look like rhubarb leaves to me. Hmmm may have to do something like this. Especially if I do a cob house some day, this would be a great wall feature/shelf.
Squeeze one whole lemon and add a tablespoon of baking soda until you make a thick creamy paste. Leave on for up to 20 min, then rinse with cold water. Make sure you make a thick creamy paste. If it's too watery, add more baking soda.