Repairing a Bondo repair

My 71 Scamp has had some rust damage repaired with Bondo in several locations on the car. I’m not really worried about most of them, but the C pillar repair is beginning to crack and bubble just a bit. 2E38EC58-2AEE-47F5-990B-6251C5852CC7.jpeg 9B69D3F9-DB37-4BC4-BEAF-5CB86DE3BEC0.jpeg CFEDFFB1-9276-490E-BF92-86DE8112CED1.jpeg 8C37598D-5FEB-458B-87A9-B942A6D6753E.jpeg

I have a vinyl top I plan to have installed, and I don’t want to trap this underneath. I have zero bodywork experience, is this something that’s approachable by someone with no Bondo experience?