Rapom's Rocket - just another Duster build thread

This week the amateur upholstery work continued by refurbishing the interior vinyl and plastic. If you go back to page 1 of this thread you will find pictures of the interior, or lack there of, when I brought the car home. Other than some of the dash and a very nice dash pad there wasn't any interior, none... At least all the hardware was tossed in a rusty coffee can. Over the years I managed to piece together an entire interior, taken from many different A Bodies, and the resultant patina was quite inconsistent across the black finishes. After researching professional auto detailer's recommendations for a plastic and vinyl treatment I settled on a product named "Solution Finish Black". Kind of pricey at $29 for 12 FL oz thru Amazon but it works wonders on old plastic drying to a consistent, non oily, satin finish on everything. So far I'm extremely happy with the results, the only question being, how long will it last?