It is crucial to clean any painted surface, even a newly painted surface, with soap and water previous to application of acrylic products. A major coatings producer states that as much as 80% of all coatings failure can be directly related to inadequate surface preparation. I’ve been ‘told’ that oil based primer is hardier than water base, but I assume so lengthy as you may be utilizing a hardi product like Zinsser you ought to be fine.