Acts, like the rest of the NT, was written in Greek. According to a blogger I found, the original text is “pisteuson epi ton kurion Iesoun Christon”, and “epi” translates as “on” or “upon”.
ETA: what BigT said.
But you found a more substantive article that is very close to the “proper answer” I was alluding to.
I’ve seen that shirt a bunch of times. The text has always been red as I remember it, matching the actual pedal it’s reproducing. I too believe this is a colorization job.
I posted the photo to r/nirvana and got an answer within minutes, and it turns out my WAG upthread was right - it was Route 8 between Olympia and Aberdeen, in 1990.
https://www.reddit.com/r/Nirvana/comments/1ffdkkr/comment/lmtvh56/?context=3
My word, you’re right! I never would’ve noticed that!
But that sucks- I thought it was a permanently planted wooden/metal billboard, which means at least there would be a 12% chance or more (I crunched the numbers 
) of it or whatever rotted/rusted/abandoned remains of it are left there now still being there for me to possibly visit some day if I’m ever in the good old Northwest U.S.A.
First: Thanks! Second: a Google search tells me Route 8 runs 49.3 miles from Olympia to Aberdeen; can we narrow down the location at all? Third: Who owned the trailer, or I’m guessing the bandmates just happened to see it while driving down Route 8 and decided to take a photo so no one knows who owned it- what are the circumstances of the photo, whose property was the trailer parked on, at one point did the owner drive it around while it still had that message on it, did he purposely leave the trailer there when he abandoned/stopped using it so that it would serve as a makeshift billboard of that message, or did he just abandon it and it inadvertently served as some kind of makeshift billboard from then on including the moment Kurt and pals decided to take this impromptu photo, did any other human beings ever photograph that trailer “billboard” at any point, … … ? ? ? ? ? ?
I am often an endless font of curiosity about the most seemingly trivial things that I find endlessly fascinating.
I’ve driven Route 8 a few times. Aside from a few small towns it mostly just cuts right through the middle of the woods, and the most interesting landmark is an abandoned cooling tower from a nuclear power plant that was built but never used. My guess is that the trailer was probably just parked in a dirt lot somewhere along the way, and Kurt saw it and thought it’d be funny to have his picture taken in front of it.
ETA: Another poster in the Reddit thread says they recall seeing that trailer just outside Aberdeen in the early '90s.
Awesome!, please try to get them to maybe narrow it down even more?
I always thought it was at 46°05’38.3"N 122°52’18.8"W, on I-5 northbound just south of Kelso. They’ve changed it; now it’s a modern typeface that just says “Jesus Christ / crucified-risen-returning” but for years it was in that old-timey Gospel typeface, and the text for a long time (after the Cobain photo) was FOR THE WAGES OF SIN IS DEATH etc. It is unrelated to the Uncle Sam billboard which is much further north, outside Chehalis.
Could this possibly be it?
I don’t think that’s it. If you look at the colorized version you can see some kind of trailer home or bungalow behind Kurt and to his left. There’s nowhere on that freeway shoulder that such a building could be relative to that billboard.
Too many trees, too.
How about this view? The sign has a twin, facing south:
I still don’t think that’s the right place - Kurt is standing on a flat surface and that’s an incline.
The style of the north-facing billboard matches the truck trailer, though. Possibly the one on the truck was designed by the same person/company who now runs gospelsigns.org.
In fact, it looks like they sell a similar design on their site as a refrigerator magnet.
ETA: The website says they’re based out of Longview, so there are probably quite a few of those signs around the region.
I was thinking that, too. Painted by the same guy, but not at the same location as his business signs that are in those current photos.
34 years on, I don’t think we’re ever gonna be able to conclusively figure out exactly which dirt field next to a single-wide in rural western Washington had a semi-trailer with a Bible verse on the side parked in it, which Kurt Cobain and his girlfriend (I was wrong earlier; the photographer, according to Reddit, was Kurt’s girlfriend Tracy Marander, not Krist Novoselic) saw while driving to Olympia and decided to stop for a photo-op in front of.
I did find some other photos taken by Marander around the same time, and at least one of them I recognize as being in Olympia from the building in the background;
https://www.instagram.com/grungerock94/p/C63GopRuaNy/?hl=en&img_index=3
That makes me think the picture might have been taken closer to Olympia than Aberdeen. Perhaps close to Mud Bay, near where his ashes were eventually scattered. It kinda looks like it could be there, but that’s just another WAG.
The Instagram post I mentioned above says the photos were taken on Kodak Tri-X 400, which is black & white film, so the above guess that the photo was colorized after the fact is most likely correct.