I don’t understand why this is happening. I painted my wheels last week and after about 3 days got curb rash (i know, wtf) so i waited about a week and a half for the pint to cure completely and tried to refinish the curb rash with the same paint. I sanded the curb rash down, cleaned the rim, dried it completely, and coated it with the same wheel paint. It’s all cracked and messed up. The wheel paint i used was Duplicolor wheel paint.

 

Did you wipe the surface clean with water then alcohol first before spraying? It looks like something contaminated the surface and reacted with the new paint. I would sand the wheel down until you can’t see any cracks, prep the sanded surface (wash it, dry it, wipe down with alcohol), spray a few coats of paint waiting 20 min between coats, then spray a few coats of clear. Make sure your work area is well
vented and free of dust

 

I would just take it to get powder coated. it's really not all that much and will look a billion times better. plus you save the time and hassle

 

This happens for a couple of reasons. Most common reason is that you are using incompatible primer, or paint that is not designed to be used on alloy. If you are using different kinds of paints you will also get this. This is just the paint underneath trying to escape, so it makes cracks. you need to use compatible paint.

 

It is the same paint i used from the original coating so i don’t know why they wouldn’t be compatible