Wow, just wow.
I've seen accessories in 1/24-1/25 for gas stations; not so much in 1/32-1/35.
The old Texaco's are neat little buildings, They are near-universally built of either clay or concrete block, ans to an exact 8x8x8 module. (other than the glass corner , which is often 4" framing with a 4x4 lally column inside to carry the roof).
There's a variant, found in Texas & the Southwest where the canopy over the gas pumps has a short mansard roof of 3 to 5 courses of red clay roof tile, this is on the two perpendicular sides of the canopy; every so often on the third, "street" side as well.