MDC to SDC via Magic

[Mifune]

Is there a spell that can convert MDC materials into SDC materials? Sort of like a reverse Ironwood or Metropolis.

[Tinker Dragoon]

Universal Balance (a Paradox Shaman spell from Rifts Spirit West) causes an M.D.C. creature to become S.D.C., but I've not found a similar spell for inanimate M.D.C. structures.

[Ectoplasmic Bidet]

The Reality Flux spell has the effect of temporarily converting MD weapons into their SDC equivalent and the Warped Space spell has among its random effect options, the ability to convert MDC materials to SDC.

Reality Flux probably doesn't even come close to meeting your needs, though. Warped Space can work(GM's are given the choice of picking the effects it displays), but has a very short duration of only one melee round unless extended via random effect.

[drewkitty ~..~]

Universal Balance (a Paradox Shaman spell from Rifts Spirit West) causes an M.D.C. creature to become S.D.C., but I've not found a similar spell for inanimate M.D.C. structures.

This might work for turning MDC wood and stuff back into SDC wood and stuff.

(Phrased 'wood and stuff' cause the only sdc to mdc spell I know Off the top of my head is the IronWord Spell.)