Will this tape handle outdoor storage, or does it need to stay dry?

FRP resists moisture better than fabric tapes, but store it in a dry location when not in use. Don't leave it soaking or submerged long-term.

Does the tape lock in place when extended?

Locking mechanism and hold behavior are not specified — test the tape after arrival to confirm how it performs on single-handed pulls and holds.

Can I use this for precise alignment on body panels or just rough measurements?

This tape is built for general shop and trackside work. For tight tolerance body panel alignment, confirm the tape's graduation marks are clear enough for your setup before relying on it.