Interior Upgrade Question

There's an auto upholstery shop in town that is very well regarded and while
talking with him regarding my car I got to wondering if I could pull out my
Cherokee seats and have him leatherize them. FAR 43.100 states pilots can:

(11) Repair upholstery and decorative furnishings of the cabin, cockpit
when the repairing does not require disassembly of any primary structure or
operating system or interfere with an operating system or affect the primary
structure of the aircraft.

Hmmmm. Does "repair upholstery" cover "replace with leather" (or pleather
for that matter)? Does taking out a seat constitute "disassembly of a
primary structure"? I'm pretty sure other people have done this but I was
just wondering how "legal" it is.


-Brian
N33431