Green paint splash fragments adhered onto the severly jagged edge of screw blade. (Detail)
<dl><dd>The clear - thick red spot at about the middle of the thickness of this screw blade seems to have implications relevant to a.k.a Red Sea Squirt. Would it be something mineral rather than organic, considering its persistence? Becaule this photo was taken about 6 months after the 'slavage'. This nearly unreal feature offers you in the scientific / engineering field another conundrum to solve.</dd></dl>
<a href="//commons.wikimedia.org/wiki/User:GB_ruleofgame" title="User:GB ruleofgame">GB ruleofgame</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>