B pillar / post on 55 xk 140 OTS

We have the rear wings loosely attached to the body on our xk140 OTS and having some issues with the B posts. The forward facing, visible part (when door open) is a little wavy/messy as the some of the set screws were broken and had to be re-welded on. Any thoughts on using a specific filler for this area that wont crack or any other suggestions for a clean finish?

Thank you!

Hi Sean…here is just a google search image…depending how rough your B pillar is you could re skin it…spot weld on…a photo you your b pilar could help others give suggestions…Steve