Synonyms for Streaking:

v.

•dirtying (verb)
Besmirching, Tarnishing, smirching, Befouling, Muddying, Sullying, Smudging, Putrefying, dirtying, staining, soiling, Defiling, Tainting, Polluting, Smearing, contaminating, Fouling.
•variegating (verb)
striping, Checking, Dappling, Tessellating, Striating, Flecking, coloring, colorizing, Checkering, Freckling, marbling.

Usage examples for Streaking

1. Then the Thought became visible as its great golden letters showed suddenly, streaking up from distant space. – Invaders from the Infinite by John Wood Campbell

2. With early dawn streaking the sky they sat down to consider. – The Blue Envelope by Roy J. Snell