I would try SEM classic coat - it is made for carpets among other things, so I don't see why it wouldn't work on fabric. Only problem would be application. You'd either have to mask and spry on with a trigger spray bottle or airbrush, or else just brush in with a stiff brush.

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08 W251 R350
97 W210 E320
91 W124 300E
86 W126 560SEL
85 W126 380SE Silver
85 W126 380SE Cranberry
79 W123 250
78 W123 280E
75 W114 280