So that there is an answer present, this matches up well with Gary Gibson's Stealing Light as posted by timbp.
For a quarter of a million years, an alien race has been hiding a vast and terrible secret
In the 25th century, only the Shoal possess the secret of faster-than-light travel (FTL), giving them absolute control over all trade and exploration throughout the galaxy. Mankind has operated within their influence for two centuries, establishing a dozen human colony worlds scattered along Shoal trade routes. Dakota Merrick, while serving as a military pilot, has witnessed atrocities for which this alien race is responsible. Now piloting a civilian cargo ship, she is currently ferrying an exploration team to a star system containing a derelict starship. From its wreckage, her passengers hope to salvage a functioning FTL drive of mysteriously non-Shoal origin. But the Shoal are not yet ready to relinquish their monopoly over a technology they acquired through ancient genocide.
timbp posted an excerpt involving the space-suit within her:
Convinced the life support was about to collapse, she activated her filmsuit. It spilled out of her skin from dozens of artificial pores, a flood of black ink that cocooned and protected her inside her own liquid spacesuit, growing transparent over her eyes so as to display the darkened space around her in infrared.