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Step 5Step 2: Wetsand with remaining grits
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 grit
The 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 direction
b) 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. However Before you 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, etc
c) 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 !
First picture = wet
Second Pic = after 1500
Third Pic = After 3000
In all these pictures you will notice a few things
a) 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 dry
You 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)
2) Make sure the previous sanding marks are completely gone before moving on to the next higher grit
The 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 direction
b) 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. However Before you 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, etc
c) 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 !
First picture = wet
Second Pic = after 1500
Third Pic = After 3000
In all these pictures you will notice a few things
a) 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 dry
You 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)
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