I think if you fill the indentation it will make it less noticeable. Go to a model shop and buy some ‘micro balloons’, it’s a powder you mix with two part epoxy to proved a filling compound. Carefully fill the dent until level and then if necessary use a very fine grade wet and dry to smooth the surface.
Match the paint and try and find someone with an airbrush to paint it or if you can’t buy a cheap one yourself. You can get some cheap Chinese ones on eBay for about twenty quid.