Those look great!! Glad you had fun at the show
To remove those marks from the cattleya leaves, just put a little bit of milk in a shallow dish, heat it up in the microwave so its hot/warm, and then with the rough side of your kitchen sponge, take some of the hot milk and gently scrub the catt leaves. Then, just wipe them dry with a damp paper towel soaked in water. That always works for me
It is just the minerals that are dried on the leaf, no big deal, just gently scrub it off