I can hear the groans already. Sorry to ask this - I am sure its the typical dumb noob question but I can't find the answer anywhere. My kit came with two pastes in a red box marked "Solingen". the one paste is in blue foil and is black, the other is in a red foil and is, well, red.

Can anyone give me any advice about when to use, what to use with and how to use these things? The only advice I have seen so far is don't use them - but that was in German and my German is not as good as my English.

Cheers

Si