Two days ago I painted a car w/DCC-single stage acry urthane.

Today I masked the bottom half off & wet sanded w/600 grit & painted DBU over the DCC. Well I got some lifting of the DCC.. I thinned The DBU 100% w/885, temp was low 80's.

Is this a problem w/DBU.....Will using the base coat that has a reactive thinner eliminate this?