Not everything, but there's a pretty large amount of podracer scrap on Tatooine since it's part of the racing circuit. I'm pretty sure Krayt Pearls have been around longer than FaD. Right now he's looking to contact a covert so that he can "travel through their network." He's also likely anticipating that some Mandalorians will know more than the armorer, or be able to further move him on his journey. For the acid, my theory is just that he never really hit it. That stuff you see