I know that there's a post about rim refinishing just below (which I didn't see before starting my project) but the difference here is that I did a LOT of wetsanding between coats. If nothing else, treat this as a supplement to express705's article.
Inspiration was provided by this . Where this article attempts to colour match and only "touch-up" the scratched/curbed portion of the rim I decided to refinish the entire rim.
Refinishing rims yourself is a cost-effective but time intensive undertaking. It took me the better part of a month including a few 4-5 hour Saturdays to do all 4. Wetsanding is the major time killer. The upside with copious wetsanding is that you won't get orange-peel, paint runs and only minor pits.
If you're not concerned with orange-peel, runs or pit marks you can skip sanding and polishing and you'll be done in an afternoon. Here is a DIY Article on the G35 Driver Forum that doesn't go as **** on the sanding
and I found after I'd finished.
Here's another .
The other concern with doing this yourself is around the durability of the paint. It's obviously not going to be even close a powdercoat finish. I haven't driven on them yet (more on that later) but I suspect that rocks will chip the paint.
Here's what you need:
Duplicolor filler primer
Duplicolor silver wheel paint
Duplicolor clear wheel paint
Klasse Paint Polish and Glaze sealant (I love this stuff, but any car polish and wax will do)
400, 800 and 100 grit 3M wet sand paper
Box of rags
Microfiber clothe (for polishing)
Cotton applicator pad (for polishing)
Not pictured is the Varsol Paint Thinner and the 200 grit dry sand paper.
I purchased everything from Canadian Tire except the Klasse, which I got from an online store.
Here's what the rims looked like prior to me working on them. All 4 rims were damaged like this with the curb rash going around almost the entire lip of the rim. Incidentally, notice that these factory G35 Coupe 18" rims have a nice grey factory finish on them that with a black primer and a white primer under. The scratches are deep and the bare metal has deep gouges in it.
Step 1: Dry Sand
I used 200 grit dry sand paper to sand down the scratches as smooth as possible. I didn't go too deep or you'd take out too much of the metal but as you can see it is a relatively smooth progression from an undamaged section to the curb rash.
Also, not clearly pictured, I used the 200 grit to lightly sanded the entire rim to promote paint adhesion.
Finally, in this step I wiped down the rim 2 or 3 times with a clean rag and the paint thinner.
Step 2: Bondo!!
Every car guy's friend is Bondo. Pictured here is 2 coats of Bondo spot putty which I applied with a popsicle stick. Apply this stuff to all damaged areas. Don't worry about applying a decent coat as most of it will come off. This was done in the same session as the Step 1 and I let it dry overnight.
Not pictured is the sanding process of the Bondo where I took off almost all the Bondo but what was in the gouged areas. I used 400 grit dry sanding for the Bondo.
Wipe it down with paint thinner but don't get too aggressive cuz the paint thinner will strip the Bondo.
Let it dry/cure overnight and that's the end of this session.
Step 3: Mask and Prime
This step took me 3 sessions. In the first session I masked off the lug holes and valve stem using paint masking tape (the green stuff). Then in my garage with some plastic put up around stuff I didn't want to get painted I sprayed a total of 2 coats on the rim. Leaving a drying time of about 10 minutes. No sanding between. I let it cure overnight.
In the next session I wet sanded the entire rim with 800 grit. This stage is important with the sanding because any imperfections here will be magnified when you get the colour and clear on. After sanding I cleaned with thinner (not too much) and sprayed another 2 coats of primer. Again another overnight cure.
Final primer session is to wet sand it smooth again with 800 grit. You can proceed to the next step right away.
Note: Remember that rattle-can spray painting yields best results if you start the spray off the subject, move the spray in 1 direction evenly across the subject and stop the spray off the subject. That prevents large blobs and helps get the paint even.
Step 4: Colour
This takes another 3 sessions. The first session is continued from where we left off in step 3, I sprayed 2 coats of silver wheel paint on the rim trying my best to keep the coat even. Invariably I messed up and got splotches or sections where it wasn't enough but that's life. Let it cure overnight again.
In the next session I wetsanded with 800 again. This was the 4th rim I did so I was getting really tired of sanding by this point. But the care that's put in here will make the rim look really good later. So I sucked it up and carefully sanded it knowing there'd be lots more in store ahead. After sanding I sprayed another 2 coats of colour then let it cure overnight.
In the last session of this step I 800 wetsanded and sprayed another 2 coats. I supposed if I repeated this step several more times a) my hands would have fallen off from all the sanding and b) I'd have a much nicer base of colour paint. Due to laziness I proceeded to Step 5.
Continued in the next post.