Removing crappy touch up paint

[BERGS2]

Now that the weather has turned nice again I'm embarking on a few cosmetic jobs to get the S2 looking top drawer for the Summer

One of these is sorting some of the poorly repaired touch ups that have been done in the past

There are a couple of scratches that have been touched up with a very poor match to the colour (Brooklands Racing Green)

Basically what I want to do is get these off so I can Have a go with the correct colour in conjunction with some of that langka stuff www.langka.com/nfhow.htm#top

does anyone have any advice as to how best to get rid of previous attempts to touch up the paint?

[WildfireS3]

Use a bucket ofwarm water with fairy liquid in it, and some Very fine wet and dry paper on a block.