Scrapping or upgrading of WPF's

[Slick]

Weapon platforms are units. From the Newbie FAQ:

8.1.6 All units share these properties:
8.1.6.1 They can be built at any planet where there is cargo room somewhere in the sector to store them and do not require a spaceyard to be built.
8.1.6.2 They do not have any maintenance cost.
8.1.6.3 They cannot be upgraded, scrapped or analyzed.
8.1.6.4 When they take damage, they are not partially damaged. A unit is fully functional until it receives enough damage to destroy it.
8.1.6.5 They are stored in cargo of planets, ships or bases; and as cargo can be jettisoned.
8.1.6.6 Shield regenerators have no effect on units because of the way their entire structure is summed up and the unit is fully functional until total damage points exceed that number and it is then destroyed. For the same reason, Crystalline and Organic armor on units cannot use their special features.

Slick.