The folks at Summit Industries are probably going to hate this post...

I found that, for most uses, Vinylex (brand of vinyl protector) can be diluted 1 to 3. First, I washed the interior vinyl surfaces with (quite) warm soapy water, rinsed---and repeated until rinse water was clear. Then I took a spare spray bottle and mixed one part Vinylex with three parts water. I sprayed this mixture onto a small piece of cloth and applied it to all surfaces.

Afterwards, I used a slightly stronger mix and applied it just to the top of the dash, the top of the rear seats, and the top two inches of the doors---all areas where the sun might beat down directly.

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Have I doomed my 27-year-old beauty to a shorter lifespan for her interior? I doubt it. It looks great. It feels great. I certainly don't think I would even like to try using the stuff full strength on the MB-Tex seats.

I'll give you guys a follow up report in another twenty years from now...

__________________
1977 Mercedes 240D. 4-speed transmission. Windows, A/C, and sunroof: all manual. Medium Red. 204K miles.
1988 Subaru GL wagon. Dual range 5-speed 4X4. Daily driver w/ twin parts car.
1994 Subaru Loyale wagon. 5-speed 4x4
1966 International 3/4 ton 4X4 truck. Ooh yeah!
1952 Ferguson TO-35 farm tractor.
1984 Snapper rear engine riding mower. Just like Forest Gump.
1988 Nimble 20 sail boat
--Older stuff is built better--