stress fracture

[g-ratter]

Working on prep work for the paint job on the truss bike when I noticed these marks on the stem. Wondering if they are stress fractures?

When I took a wire wheel to it they seemed disappear.

Any thoughts? Should be worried?

 

[outsider13]

CeeBee is right, you wouldn't want to Face plant on the jagged stem if it broke while standing on the pedals, while peddling hard.