WHen using rattle can paints, its always a good idea to invest in soem tack rags, and a pad of grey scotcjhbrite - £2 will see you for those.
as for the clear coat. if you insist on using one out of an aerosol, ive found halfords clear laqueres to be amongst the best. but id really reccomend popping it down to a car body shop and gettign them to laquer it with propper catylised 2 pack laquer.
Good luck with it !
p.s 1000 grit may be a lil too much, 1500-2000 is usualy whatss used, rub 2 bits of 1000 togeather, and that will give you a better result, and remember to SOAK the wet and dry. never ever ever use it dry !