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The paint finish is not done well and is affected by moisture.
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If there is moisture or it is greasy, let's find out the reason!
The skeleton material inside is a synthetic board, which will deform when exposed to moisture. >>>More
This is related to the hinge being soaked in oil before leaving the factory. When transporting, the door is flat, and when it is installed in the house, it is erected, so there will be oil dripping. >>>More
Can you take a photo of your security door lock? Do you mean positioning the lock by lock rebound?
If you want a high gloss, choose a varnish with low viscosity and high solids content. >>>More
After a long time of oxidation, it will peel, and the only way to do it is to redo the paint. Hope it helps, thanks for adopting!