Well if it were me, I'd leave it along, but hey if you want to have something other than the dull aluminized look after a few years you could try the rattle can after scuffing the surface well.
I remember Eastwood selling a silver High temp paint in a can that I used on an exhaust manifold many moons ago. It would prob work well on anything after the cats, but who's to say.
If you like, I can take pix of the tailpipes I still have from Dan's system I bought and installed in 01/2009, so you can have an idea of what the color of the pipe will be in 8 years.
For me, really, it would depend on how well the X-Pipe is tucked up under the car, as you won't see the over-the-axle pipes unless you pull a rear wheel.
My new custom bent system is tucked up even closer to the body than Dan's system sat. For reference I could also take you a low to the ground picture of my car from the side, as well as a waist high picture.
Let me go look thru my phone for anything I currently may have. As an FYI the picture in my SIG is of Dan's system, and not the current one. I need to wash and wax her and take some new pix.
Here's a current pix. Ugly background, no great light, but you get the picture, literally
This was right after I finished fixing the transmission pan leak, hence the pan under the car in case I had over filled it.
Clear Image Tri-Ys & Hi-Flow cats >> 2.5" X-Pipe & Magnaflow Tri-Chambers, Mike Harris 4L60E, Circle-D 2,400 RPM TC, All MOOG FT End & Del-A-Lum bushed MOOG CTRL Arms, Eibach FT & New Stock HT rear springs. Hotchkis Sway Bars & End Links, RAISS, 3.73 Gears in Eaton carrier, Dynoshaft & CIA Loop, BMR Trailing Arms, Braided Brake Hoses, Taylor Spiro-Pro Wires, AutoMeter Water Temp & Oil PSI Gauges, Impala Console. ATE Blue Brake Fluid. Skip White distributor. 20's, Z28 Cluster, Corbeau GTS Seat