ceramic heat barrier

my xj gets way to hot for me, and dont have a.c. i have been thinking about trying a ceramic powder additive to mix with paint (hammered finish) to keep the heat out, i would be painting interior and out,
i really havent been able to get any first hand info about it, ive looked for it in local stores, but ive only found it on ebay. which makes me skeptical, i figured some one here must have some info, or hopefully some experience, i really dont want to add 25 - 40 lbs. to my paint but it is alot lighter then all the insulation ive taken out. i also dont want to retain heat.

seems to me like finding an a/c system off of a junker would be waaayy easier/better off in the end. i know that's what i would do. but what do i know? i use my a/c compressor for OBA now.

xj is gutted. no dash, no anything, its down to the outer skin in most areas. and i too have oba

well damn. have you ever thought of mixing in some type of ceramic powder additive in with some type of paint and spraying it on the exterior/interior. i think that'll be you best option at this point. i am now of no help to you, but was i ever? haha oh yeah, got pics?

Make some half doors and cut the roof off...A little extreme, but it would give you more air flow haha

Put some misters inside with a water tank in the back. That would be sweet!!

i would like to run an a/c, but it wouldnt run off the engine. but even then i need insulation, or at least reflect radiant heat, especially at the fire wall and roof im going for the mostly full bodied weather proof truggy thingy. (SORRY CANT POST PICS). I went ahead and bought some from the company on ebay, called hytechsales.com i got what they say is enough for 2 gallons, and it was 33$ shiped from florida.
Im going to make test panels, record temps and other stuff and ill post results on this thread later. thanks