Restoring the back

(always when sanding keep a thumb/finger above the camera to avoid scratching the glass lens ! )

Orange

Blue

This is awetsanding guide. If you have never wetsanded before, or wonder why you never get good results this should help. This will let you restore anything that is plastic, or using harder/ finer grits you can polish metal/aluminum/painted parts. I apologize for the length of the guide but I think the tips here will help you get great results.Sandpaper 320(or 500),800,1000,1500,2000,2500,3000 grit3M Rubbing compoundMachine Polisher ( Power Drill or small buffer)MicrofibersSticky tack and or tapeIf you want to save time and money I recommend just purchasing a 3M headlight restoration kit (available at almost all car part stores)$10 bucks at amazon right nowIt will have almost everything you need, but you still need to buy 1000,1500 and 2000 grit sandpaper + a microfiber on the sideDry sand with the least aggressive sandpaper needed to remove scratches. If you have deep scratches you may have to go down to 320-800, but if you have light scratches, 1000 or 1500 might be enough. The best way to test this is to run your fingernail around your phone and try to find a deep scratch. Start at a high grit ( 1500) and see if that removes the scracthes. If you still see deep scratches, try the next most aggressive grit, etc. For me I had to go all the way down to 320 grit, due to several 2-3mm deep defects. This first step is really time intensive, but make sure you don't use water, on the first step because it tends to hide scratches. When you dry sand you can see all the fine sanding marks you are making which allows you to see the scratches you haven't removed. Dry sanding clogs sandpaper, but you can either buy more sandpaper or wash the sandpaper in water and dry it before you use it. Before you finish this first step, make sure all your sanding marks are in one direction; you'll see why later.1) Use very little water when you wetsand ( don't want to kill you iPhone)2) Make sure the previous sanding marks are completely gone before moving on to the next higher gritThe 2nd point is important, and the reason many people get poor results when wetsanding. It's a simple technique but it takes practice/patience to get right. But here are some tips:a) Before moving on to a higher grit make sure all your sanding lines are in the same direction. When you first start sanding the part you can sand in any direction you want, but before you move to a higher grit make sure to sand the entire part down in one directionb) When you have moved to your next higher grit you don't have to sand in a single perpendicular direction (a common myth). Just try to sand the part down as best you can in any direction. Howeveryou move on to a higher grit, make sure you sand perpendicular to the grit you before. This will let you know where you have to keep sanding before moving on.So if your last sanding marks using 800 grit were left to right , the last sanding marks on 1000 should be top to bottom, then 1500 should be left to right, etcc) Before you move on, dry the part a bit, to make sure all the previous sanding marks are gone ( again water tends to hide scratches )The most time consuming jumps for me were sanding 800grit lines with 1000 grit , and the 1000 grit lines with 1500 grit. These two are time consuming steps , but make sure you take your time, because the finer grit sandpapers will be unable to remove these deep marks (especially 800 grit lines).When wetsanding the phone it should look like below, not too much water and a slight white film. I kept all my wetsanding paper in a bowl of water, and then dried it on a towel on my lap before using it on the phone. You want the paper to be wet, but not running !After 1500After 3000In all these pictures you will notice a few thingsa) All the sanding marks are in one direction, and you can see that there are Zero sanding marks in any other direction.b) The phone is dryYou may be wondering why all my sanding marks are lengthwise. When I wetsand I still follow what I said above ( last step is to sand in the perpendicular direction to make sure all the previous sanding marks are gone) but then additionally I lightly sand in the longest dimension of the part, this helps me make sure I haven't left any deep sanding marks of the similar grit ( ie, I lightly sand 1000 grit sanding line with 1000grit sandpaper so that sanding with 1500 is easier)Before you start polishing make sure you cover up your headphone port, volume buttons, vibrate button and 30 pin dock with sticky tack (that blue stuff). You can cover the camera glass, but the polishing compounds are not abrasiveness enough to scratch it (unlike the sandpaper). Sticky tack is easy to apply, and come off in one piece. Tape will probably work too but I found that the tape kept lifting off when I was buffing. Refer to the #2 in the following picture (the gray stuff)Only two steps here, bringing back the shine, and then removing polishing "halosYou can use what is found in the 3M headlight kit using a power drillPolishing Pad =3m PadPolish = 3M rubbing compoundResultsAs you can see it leaves you "Halos"To remove these use the 3M rubbing compound and polish the halo's off with a microfiber towel ( this is softer than the orange 3m Pad).-----------------------------I had access to detailing products so I used the following( using a rotary tool)Polishing Pad =3M PadPolish = Meguair's 205Then I finished with some Meguair's NXT 2.0 waxResults = completely flawless mirror finish