Most of the time is to allow drying after each step.
I used 1000, 2000 then 3000 grit 2 inch sanding disks in a drill to wet sand, followed by hand sanding then washing and drying at each step. Then I put on gloves and applied Wipe-New.
I had not used Wipe-New" before. The result is impressive.
The "AFTER" picture
<click to enlarge>
The "BEFORE" picture
The headlight as it was with masking tape applied to the surrounding paint.
Hard to believe it was this bad.
Three steps of progressively finer sanding disks were used wet followed by cleaning and drying after each.
Machine sanding with the drill was followed with hand sanding with the same grade pad at each step.
New sanding disks were used for each headlamp at each step.
Contains:
tert-butyl acetate,
1-choro-4-(trifloromethyl)
benzene and benzaldehyde.
Wear gloves.
Use outside.
Have both headlights prepared before you open this package. It evaporates very quickly.
Wipe each headlight only once to coat the surface.
I went in horizontal strips.
The applicator works well.
Do not try to touch up.
Wait for an hour.
Wipe-New product link
I bought at Canadian Tire for about C$20 +tax
I am very pleased!
I will see better in the dark and will not confuse on-coming drivers.
Lions Head, Ontario, Canada