The chassis for my car is powder coated - but I did start with all new steel rather then an original. I had painted it but it wasn't holding up to dropped tools, fasteners or other 'errors'. I took it to a powder coater locally (Powder Tech, Duanesburg, NY) that specializes in doing race car chassis. They did an entire media blast to white metal, leaving a good 'tooth' then did the coating. Another member here, Arrowhead, had his '33 Factory 5 done there as well. We are both extremely happy with the job done. Now, had I used an 80 year old rebuilt OEM frame, I would not have had the powder coating done as those chassis' have too many age related cracks and hidden rust.

One of many articles available for review: How to Powder Coat - Powder Coating Manual | Powder Coating Help, information and powder coating advice, others to do with flexibility are found using this Google search term: powder coating flexibility. It is a flexible coating!!!!