Av is right on target. If you charred the rim, I'm guessing that you used a regular Zippo. If you use a Zippo with the pipe insert, that won't happen. Also, allow a second or two for the smell of the zippo fuel to burn off. Also, I'd like to recommend the zippo black fuel – it has a relatively low odor component. The Zippo is a great pipe later, because it burns at a fairly low temperature, only slightly higher than that of a wooden match, and about 1000° C lower than a butane lighter.