I have just done mine with a rattle can, just took my time with it and got it perfect.
Just prepare it well, make sure there is a good key and it is nice and smooth with no imperfections in it, then use a good quality plastic primer, then normal primer and flat off any imperfections again. Then gloss black colour, flat again, then I put the laquer on in very thick coats and sprayed out any runs, then leave it to dry for a full week in a warm room, spare bedroom is ideal.
Then after a week, flat it down all over with some 1500 wet and dry ( what I used for all the flatting down) and rub out any imperfections again, go over with some g3 cutting compound (stronger and better than t-cut) then use your selected polish and rub in well. Finish off with your chosen wax and it should come up like glass!
I'll get a few pics of the one I've just finished off later when I get home. Looks as good as the original gt ones!