Use printing paper to cover the areas with masking tape to secure it. Tape never touches the paint. Spray clear coat at seam , or use the color of paint that?s being used to prevent leaks or bleeding. If it?s a small area put the paper under the tape to fit. Or pull the length of tape needed, apply to any surface and pull up and down to remove most of the stickiness then apply as usual.,.,.,

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ENGINE COSTS ARE " OUT OF SIGHT " .....

I used Tamiya tape, no issues.