How to fix existing paint peeling after using spray can to touch up?

[Delna]

 Hi 

I recently had my bathroom door knobs changed which caused damage to the doors. I filled with builders bog, sanded & then waited to paint that part. 
I purchased Color Lab Enamel white gloss paint & sprayed. The paint adhered ok to the parts having the filler but I got a shock that when the spray went onto the existing finish it caused the old paint to peel off like a skin!! Something in the spray can has reacted with the old finish which was in excellent condition causing it to peel. 
Please advise me on how to fix this problem? I don’t want to sand down the whole door, so how do I prevent the peeling & painting the damaged part again ?

ThankyouThe pink is the builders bog where the spray paint has adhered well but the wood part is where the excess spray paint fell & started peeling off the old finish.

[MitchellMc]

Hi @Delna,

Personally, I would sand those areas with 180/240-grit to remove any loose paint and to scuff up the surface. You should then scuff up the whole face of the door with 240-grit. Apply Dulux Max Adhesion to the whole door and then, when dry, paint with Aquanamel. You could try to patch and repair this section using the above products, but I suspect the result will be fairly noticeable.

Please let me know if you have any questions.

Mitchell

[Delna]

Thank you, do these come in small sizes ? Also would you know why this happened? 

[MitchellMc · Accepted solution]

The smallest size tins for those products would be 1 litre for the Max Adhesion, but the Aquanamel paint is available in 500ml @Delna. 

It was likely the solvents included in the spray can that softened the paint on the door, causing it to delaminate.

Mitchell