Tube peeling witness groove methods and apparatus

1. A tube scraping tool comprising:

a handle; and

a blade, carried by the handle,

wherein:

the tool has first and second laterally spaced apart portions for engaging the tube outer diameter (OD) surface during a drawing of the tool along the tube, wherein the underside of the handle is formed of a generally channel-like section having first and second side rails and having a base surface;

the first and second portions are respective first and second leading portions of the respective first and second side rails;

the first and second side rails have respective first and second trailing portions;

the blade has a cutting edge positioned to trail the first and second leading portions during the drawing and laterally between the first and second side rails; and

the first and second leading portions are higher than the first and second trailing portions.

2. The tube scraping tool of claim 1 wherein:

the blade has a passageway for passing a curl of removed material.

3. The tube scraping tool of claim 2 wherein:

the cutting edge protrudes beyond a remaining portion of the blade at an inlet to the passageway by a height of at least 0.10 mm.

4. The tube scraping tool of claim 3 wherein:

the height is 0.10 mm to 0.20 mm.

5. The tube scraping tool of claim 1 wherein:

the blade is steel.

6. The tool of claim 1 wherein:

the blade is mounted to the handle via an axle.

7. The tool of claim 6 wherein:

the axle provides the blade with a restricted non-zero rotational range.

8. The tool of claim 7 wherein:

the restricted non-zero rotational range is at least 0.5°.

9. The tool of claim 1 wherein:

the handle has a compartment partially receiving the blade.