Your problem might be related to either the dark color, heat buildup from the storm door, improper priming, or type the of paint that was used....Is the door steel or wooden? & which direction does it face?
Some exterior door warranties are actually void when you add a storm door because of the heat build up it causes ~ I don't have an absolute remedy, but maybe that info will help you get started. I would definitely talk to some experts in your area,front doors can be expensive. (I grew up near Decatur, wish I had some names for you)
Sounds like water may be getting to your paint. Make sure yor storm door is insulated water tight. Seems like paint would easily come off a threshold from foot traffic. Ever thought about just an alumininum or unpainted surface for a threshold?
Micci S is correct, many of the foam core doors will void their warranty if you paint the door a dark color.
Paint bubbles for a few reasons. 1. water in paint or on door, 2. improper prep of the door. 3, incompatible paint to the material that the door is made of.
My thoughts first off was the door threshold stained at one time? Perhaps it contains a oil
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based sealant that has not been completely removed?
The oils in the stain or on the item being painted will prevent proper adhesion of the paint. This oftentimes results in fish eye in the paint. We see this a lot when people fail to prep their kitchen cabinets and the grease in the kitchen prevents the paint from sticking.
Sanding the threshold is not the answer, although it help and should be considered when doing this. However, You need to clean the item real well, prior to sanding. If not the sanding will push the oils deeper into the surface making it even harder to remove.
Some plastics, but after reading your question, I think your painting wood, just will not except just any sort of paint. So you need to check the materials that the paint was designed to cover before doing anything else.
Paint bubbles for a few reasons. 1. water in paint or on door, 2. improper prep of the door. 3, incompatible paint to the material that the door is made of.
My thoughts first off was the door threshold stained at one time? Perhaps it contains a oil ...»
The oils in the stain or on the item being painted will prevent proper adhesion of the paint. This oftentimes results in fish eye in the paint. We see this a lot when people fail to prep their kitchen cabinets and the grease in the kitchen prevents the paint from sticking.
Sanding the threshold is not the answer, although it help and should be considered when doing this. However, You need to clean the item real well, prior to sanding. If not the sanding will push the oils deeper into the surface making it even harder to remove.
Some plastics, but after reading your question, I think your painting wood, just will not except just any sort of paint. So you need to check the materials that the paint was designed to cover before doing anything else.