How might a ghost interact with psionic items, powers, and effects that are made of or produce ectoplasm?

Question

Some background: the ghostly psionic character in question is a ghost due to in-campaign events which I shall skip over unless needed. Mechanically this is represented by a level of ghost racial class from the Savage Progressions web articles. Over the course of the campaign, the character has gained as additional 3 ghost levels, and took just one feat from Ghostwalk: Ectoplasm - but we are simply using the feat as is without the rest of the setting baggage. In case it matters, it is an Oerth / Greyhawk-based campaign.

The Ectoplasm feat allows the production of ectoplasm by the ghost from any part or parts of their body, in a few colors, and in sticky or slippery consistencies which give minor bonuses to certain actions. It is a ghost touch material.

The character has with them a Skin of Ectoplasmic Armor, and knows the Astral Construct and Wall of Ectoplasm powers.

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Thus, how might the ghostly psionic character be able (or unable) to interact with the skin and the results of their powers when they are in a state of manifestion, and the skin, astral construct, and wall being located on the Prime Material?

Interact for this question means to hide inside, pass through/are blocked, manipulate, inhabit, or wear the skin/construct, etc.. Other examples of ectoplasm and interactions with ectoplasm that might be useful are welcome even though I did not list them in my question.

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(The 3.5 tag is because most of the item/effects are 3.5, and the 3.0 tag is because Ghostwalk and Savage Progressions are 3.0.)

Answer 1

The ectoplasm created by the Ectoplasm feat is special, in its color, sticky/slippery, and ghost touch properties. None of those things apply to any other ectoplasm.

The ectoplasms created by various psionic powers are each also special, often, having particular properties described by that power. The animation of the ectoplasm created by astral construct is a prime example; other ectoplasms don’t have that.

Since the ectoplasm created by psionic powers is different from that created by the feat, and doesn’t have ghost touch, there is no special interaction as a result of that feat. This question is the same regardless of whether or not the ghost has it.

As for what interactions a ghost has with those psionic powers, those are also not given any special rules. A ghost interacts with psionic ectoplasm the same way it interacts with any other magical/psionic material. And a ghost doesn’t really have special rules either: if it is not manifested, it is ethereal, and if it is, it is incorporeal (each from the perspective of the Material Plane). Thus, a ghost interacts with ectoplasm from psionic powers the same way any ethereal or incorporeal creature interacts with any magical/psionic material. (At 2nd level of the savage progression, a ghost can get access to telekinesis, which may interact with ectoplasm somewhat differently—but still as normal for telekinesis with magical/psionic objects.)

Ethereal and incorporeal are very similar in most regards, but one key difference is that magic spells, psionic powers, and magic or psionic weapons affect incorporeal creatures (though with a 50% chance of the incorporeal creature ignoring damage from these sources unless they are force or ghost touch effects). Ethereal creatures are not so affected (unless it’s transdimensional; see Transdimensional Spell or Transdimensional Power).

So the wall from wall of ectoplasm and the creature from astral construct are each the effect of a psionic power, and so affect an incorporeal creature like a manifested ghost, but not an ethereal one, like a ghost that isn’t manifested.

The skin of ectoplasmic armor armors a ghost as normal, which means it protects against other ethereal creatures, and protects against those material attacks that it is vulnerable to while manifested. It would ignore a material creature’s own skin of ectoplasmic armor, since unlike magic/psionic weapons, magic/psionic armor doesn’t have a rule allowing it to do anything to incorporeal targets.