Why does paint crack?

Answer

Cracking of paint is credited to substandard paint, but in most cases the cause is poor surface preparation or incorrect methods of paint application. In older homes and buildings, paint cracking is caused by the build up of several layers of paint over earlier brittle coats that no longer can bond.
Q&A Related to "Why does paint crack?"
Paint can adhere to other painted surfaces and create a crack in your paint job if you do not use high block-resistance paint or if you close your doors or windows before the paint
http://www.ehow.com/info_8681842_paint-crack.html
There are many different types of paint. Also, metal is a non-porous surface, mostly - you can increase its porosity (or absorption, ability to hold paint) by sanding or otherwise
http://wiki.answers.com/Q/Why_does_paint_on_metal_...
Pretty much what Steven said. Your voice cracking is a result of no air passing through your vocal chords. Your chords need air in order to vibrate-and it is the vibration that produces
http://www.quora.com/Voice/Why-does-your-voice-cra...
try dry sanding it, and just wiping it down with a dry cloth, then go over with the paint you are using, if that doesnt work then try a different paint :
http://answers.yahoo.com/question/index?qid=201108...
1 Additional Answer
Ask.com Answer for: why does paint crack
Why Does Paint Crack?
When done correctly, your interior or exterior paint job should last approximately the time stated by your paint manufacturer, but some paint jobs crack in spite of your best efforts. Before you begin a paint project it is important to learn how weather... More »
Difficulty: Easy
Source: www.ehow.com
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