OK, I did a search on "Langka". There are 257 posts related to this touch-up product/process and I am too lazy to read them all. Is it worth the money? Is it any more effective than what is outlined in David Bynon's "Repairing Chips & Scratches". Is the "blob remover" siimply laquer reducer? (I'll just bet that it is.) I've been doing touch-ups since 1960 and probably am almost as good as David, but I can always get better. By the way, I learned to avoid metallic paint early on. See my siganture. 
Tom
Tom