Limited support
This feature is only present in Portal 2: Community Edition and Portal: Revolution.
Caution:

BasePaintType is an internal entity and should not be used on its own.

BASE BasePaintType

Paint Type property.

KeyValues

Paint Type <choices> = Repulsion Gel (0)

The type of Gel created.

Possible Values:

NameValue
Repulsion Gel0
Reflection Gel1
Propulsion Gel2
Conversion Gel3
Cleansing Gel4
Adhesion Gel5

[H] Paint Type <choices> = Repulsion Gel (0)

The type of gel displayed in Hammer.

Possible Values:

NameValue
Repulsion Gel0
Reflection Gel1
Propulsion Gel2
Conversion Gel3
Cleansing Gel4
Adhesion Gel5