Now your GTI probably came with the nasty wood trim around the radio and so on. This isn't like by many people and can be replaced with simple factory fit black that comes in lower spec cars.
This is how it looks as standard

You have three options here:
-sand original down and repaint
-buy brushed alu R32 trim from vwspeed.co.uk
-buy black trim and try to match side bits in.
The two lengths that run down the side are not available unless you buy the wole radio cage so you'll probably have to paint the original ones or find some from a car being broken.
There is a guide to removing all the pieces of trims in the 'How To' thread in the maintenance section.
the part numbers for the BLACK interior trim are as follows
V1JO 858 035 1Q A - CAP £5.94
V1JO 819 157 G1 QA - TRIM £3.77
V1JO 858 607 C1 QA - DASH TRIM £ 4.38
V1J2 857 351 C1 QA - ASHTRAY COVER £5.34
BEAR IN MIND IF YOU HAVE CLIMATE CONTROL YOU WILL NOT NEED THE AIRCON COVER BUT THE APPROPRIATE ONE FOR CLIMATRONIC
Total : £22.83 with VAT
Note this will still leave you with wood side bits unless you buy a whole new radio cage (about £50 I think)

In the end after opting for black dealer items I decided to paint the wood trim so it all matched:

Now all I need to do is replace gear knob.
I'll add the tips to spraying in here when I get a chance.