I've used the Langka kit but would rather just buy a small bottle of paint at Paintscratch and DIY. Take a small brush and brush some paint on, then come by with something like 1000 grit and work up to 2000 grit sandpaper until you finish off with some polish. I kept on removing the paint in the scratch with the supplied Langka paint thinner -- just do the old fashioned way and you'll have good success.

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