Please help me identify a cure! (Bodywork Newbie here)

Yeah, lol I was sticker shocked by the other fillers. It's a place called industrial finishes, very high quality materials for auto body repair paint supplies. They sell only professional grade stuff, but they have prices to match. It cost me $500 just to buy paint, catalyst and hardner to paint our restoration project tractor. And it was a gallon. Sprayed out so clean and like glass finish. Looks great years later, it's the only place I will buy automotive grade paint and supplies.