We love scribing templates, as a tool to guide our blades or scribing tools when engraving panel lines in our planes, gunplas etc.
When we are dealing with complex and/or curved surfaces though, stencils may not always be usable. In those cases, you need a different solution to help you guide your blades without slipping and damaging the model.
These flexible but hard tapes were created exactly for that purpose. You can stick them to any surface of your model, following any shape needed for the desire you want, and then slide your blade on on of its edges, being sure you will achieve a perfect line.
We have to prepare each shipment individually as they are ordered, so allow it in 3-4 weeks to arrive in the USA/Canada (to be safe) and 3-6 weeks rest of the world, though they are usually delivered much faster.