Yes, but not on all shapes. Squid is a stiff fabric that cannot be reshaped on double-curved surfaces, so you cannot use Squid on convex cupolas for example. But...
Partially. Squid wasn't developed specifically to darken rooms, but the fabric blocks some light from coming in. The darkest colour (Rock) is the most suitable for...
Absolutely. Squid has been tested against strong UV rays and this does not change the glue's colour or weaken its strength. Because the fabric is stuck straight...
You can remove dust from Squid with a microfibre cloth or vacuum with a brush. Washing or cleaning with chemicals impairs its stickiness, so this must be avoided...