I would probably say make them invincible by using the armour amplifiers, the infinite one for example.

I'm thinking you just need to add an equip line to the loadout but I could be wrong.

@ DV, this is from the solararch for the "wplatform"

destructible = true
explosion_arch = explosion_wplatform
hit_pts = 1600

remove those lines from your custom entry and add this to it

hit_pts = 999999961690316250000000000000000000.000000

This makes them indestructable, a word of warning here though make sure you don't do this to the normal weapon platforms as it will make almost every random mission impossible to complete, only use it with a custom entry.

**shuffles of with a new headache**

Ok thanks now I need to make new wep platform and make that change.... simple as making a system.