One of my errors during the build was not to have wiped down the pipes before I ran up the engine. The result is that I have a few finger print marks near the collets - more of an annoyance more than anything else.
I ordered some 'Blue Job' from ebay. After picking myself up from the floor over how little magic dust there was in the pot I set about having a go ..
The results are ok - i probably need to put as little more elbow grease into the job but lunch is calling! At this stage though i'm not sure its worth the £15.