Three word game ...

[Fnaar]

rainbow, way up

 

[Ming the Merciless]

Olympus Mons was

 

[postman]

grumbling away quietly

 

[classic33]

in the background

 

[postman]

while lava lampmakers

 

[Ming the Merciless]

From the 1970s

 

[postman]

replaced faulty wiring

 

[mistyoptic]

and added sparkles

 

[classic33]

in an attempt

 

[Fnaar]

to woo new

 

[classic33]

buyers into their

 

[Fnaar]

capitalist lairs, wherein

 

[mistyoptic]

trays of canapés

 

[mikeIow]

lay, awaiting their

 

[Ming the Merciless]

fat little fingers