No initial prep just paint the doors and worry about removing the paint on the glass after.
How to glaze glass doors.
You can achieve a variety of looks.
The first step is to clean the sliding doors and the track really well.
Apply a thin coat of the spray paint and let it dry.
The masking liquid method.
The glazing of doors is carried out only when the door has been hung.
I used a good multi purpose cleaner method all purpose cleaner along with paper towels and q tips to get in the little nooks and crannies.
Again this is a long process if your door has lots of glass panels.
Take a shard of the old glass with you to match the thickness.
My door tracks had quite the build up of dirt and other gunk.
If you need new glass measure the opening subtract 1 8 in.
Glazing a door whether internal or external is a fairly straightforward diy job however it is very important that you always buy glass that complies with safety regulations.
How to paint a glass interior door.
This is to make the door lighter to handle and reduces the risk of the glass being damaged.
Also buy a package of glazing points to hold the glass in place while the new compound hardens.
An easy to follow instructional video on how to glaze an exterior door.
Apply additional coats if you wish for great opacity.
How to paint sliding glass doors.
Clean the glass throughly and tape off the window or door frame.
From your measurements and have the new glass cut to size at a full service hardware store.
These are simple glazing tips that will suit the location and help with the personal choices such as whether the glass should be clear or obscure if the glass is set at a low level it needs to be toughened safety glass.