Re: Making Stencils and Using Stencils
For one off use, "Frisket" film masking (a low tack version of the sticky one side clear plastic used for covering school books) - you only need to use this for the immediate area you're actually painting (for the rest use paper, plastic sheet, masking tape, etc.- save money!).
Cut in situ (carefully!) with a scalpel to a line drawn on the surface.
Common or garden masking tape isn't as good, but the car guys use plastic versions which can actually follow a gentle(ish) curve.