I find the wriggle technique to be very attractive, and have tried it on a few bits and pieces. But a question: Is the graver struck with the mallet for each "wriggle", or is it merely the downforce from the engraver's hand?
When I have tried it, I just used my hand/wrist for the downforce. Easy and very quick - but the results are very shallow, and I fear they would soon disappear from cleaning, wear, etc.