C63 paint is looking dull, need paint correction and ceramic coating

So my C63 has been an absolute joy to drive, but I'll admit I've been neglecting the paintwork for way too long and it's really starting to show. The metallic finish has lost its depth, there are swirl marks everywhere from careless washing, and I've even got a few light scratches that catch the light in the most annoying way. I've been thinking about getting paint correction done for a while, and I'm also really interested in ceramic coating because I've heard it's a game-changer for keeping the car clean and protected against the brutal summer sun we get here. I work near the ICAD area and I've been looking for Mercedes-Benz paint protection and detailing near ICAD that actually knows what they're doing with these cars. I've seen a few places mentioned like Exotic Auto Services and Red Fox Auto Care, but I'm not sure which one is actually worth the money. I don't want to end up somewhere that uses cheap products or inexperienced staff that could make the paint worse. Has anyone here had paint correction or ceramic coating done on their Mercedes at a specialist in the Musaffah or ICAD area recently and been really happy with the results? I'm especially interested in how long the ceramic coating has lasted and whether they offer any kind of warranty on their work. Any honest recommendations would be massively appreciated because I want to get this done before the summer heat really kicks in and makes everything worse.