That sounds like an amazing day! I'm glad you were able to help your friends with the bamboo, and that you found a new business opportunity.
I'm not sure if I have any tips for finding clients for the aluminum foundry, but I'm sure you'll be able to figure it out. You seem like a resourceful person, and you're already off to a good start by reaching out to people on social media.
I'm also impressed that you were able to get such a large sack of metal into your car. That must have been quite a feat!
It sounds like you had a lot of fun on your day out, and that you're really enjoying your life in Colombia.