Just had my UPVC front door painted. I bought a Zinnser Paint specifically for upvc (£94 for 5 litres). I got the UPVC panel replaced with a cottage style one last week as the old one had holes in it so the surface was immaculate and flat. Overall I’m happy, I knew that painting with a brush would t get that smooth factory finish that spraying would but TBH it has an almost wood grain look which I kind of like. The only problem is the bits I have attached. The painters baffled as to what caused it and tbh so am I. It was very sunny yesterday so maybe the paint blistered? I don’t know, I’m not a painter but was just wondering if there would be a way to make it less noticeable? I’m hesitant to sand it atm as the painter has only finished and I know this stuff takes up to 7 days to fully cure. Would sanding then touching up be advised once fully cured? I’m just really fussy. Any help would be great. Thanks in advance.