I'm the process of respraying my big bumpers off a mk2 at the moment. Its time consuming work but the more time you put into the preperation the more it pays off. fact! i think the part you want to repair is plastic, and the whole lot wants doing really so you need to:
rub the whole lot down with some 200-400 grit
go over it lightly with 1000ish grit wet and dry paper.
filler the holes
when dry sand the filler back and then use fine hole filler to fill any tiny scratches or small chips and then leave to dry and sand that back flush
then you could probably use a 500ml can of
PLASTIC primer and primer the whole lower section.(you can tape off the top black section with masking tape and newspaper.)
then flat that back with 1500 grit wet and dry
then put the top coat on with your colour coded rattle can (problem is when i did mine apline white, L90e, theres 6 different shades of alpine white so the colour match isn't always perfect)
then you'd need to flat that back with 1500
then put some clear laquer ontop
then flat that back again
then polish it!!
now make yourself another cuppa, stand back and admire the work of art you just made!!! If you did it yourself it would take a bit of time as you'd have to wait for the paint to dry and the filler etc also the wet and drying takes a while. It seems a bit daunting at first but you might aswell start spraying somewhere!!

its good fun!