Using Jim’s Film Trimmer

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U Bend | Zee Bend
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We're often asked what are the characteristics of an expert covering job. While there are many, let's consider the joint between two pieces of covering.  One piece should lap over the other with an absolutely uniform width seam.  Until the Jim’s Film Trimmer getting crisp laps was haphazard at best - now they're a cinch.

In the first shot you'll notice eight narrow grooves cut in the bottom; the MonoKote lap rides in a groove and guides the tool as it cuts.  Use only enough force to glide the cutter through the plastic.

Most trimming tools use costly knife blades, ours needs only inexpensive industrial single edge razor blades, and we wear out the blade's entire length, not just one position.  That's an important feature because MonoKote and all other plastic coverings dull the blade quickly.  Look at this photo to see how this feature works.  Notice the four left grooves are cut at a different distance from the center than the four right grooves.  When all eight cutting positions become dull, turn the blade over and unused segments of its edge will align with the grooves.  That gives you a total of sixteen edges on one inexpensive razor blade.

Remove the excess MonoKote to within 1/4" of the edge with a scissors.  We don't want to have scrap material interfering with the cutter's movement.

Clip the corner at an angle so the blade doesn't hit the plastic at a right angle.  That makes starting the cut much easier.

Cut the lap to a uniform width with Jim’s Film Trimmer.

Iron the lap down tightly.

Tools | Main Menu
U Bend | Zee Bend
Bending Landing Gear Wire | Bending Hard Brass Tubing
Motor Mount Drill Bushing Kit
Tap-N-Drill Guide | Wing Bolt Guide
Easy Hinger