i like, i like...
Purple is a nice color for the mini... I think i've actually seen a purple one on the street, but a really dark metallic purple, not like this lavender color ...
And as for panel lines, yeah, try a wash of dark purple... don't make'em black or else it'll look like an RC car (i.e. it won't be realistic anymore)
P.s. did u coat the entire car with future floor wax? the clear parts as well?