i will probably get shot for this
but if you are not after a show car and have an indoors space to
work , did you ever consider roller painting it with some yacht/marine enamel ??
it does not require any special skills as it does not involve spraying and will cost you well under 150-200 quid doing it yourself .
i have not actually done it myself due to lack of space but when i looked into
this a few years back i have seen really good examples of finished jobs done
around the world ,also had a go myself on a few spare spoliers etc (athome)
at the time ,results were pretty good . some people i have seen even managed mirror
finish jobs with extra wet sanding /polishing etc .
just google "painting with a roller" in google if interested