Warren (Staff) (21/01/2016)

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Professionally sprayed primer from a 2 pack system will usually be fine once fully cured.  You should get a release with any decent release agent. Ideally from a mould preparation point, it would be more convenient for a high gloss painted finish (2 pack also) as it means less work needed to finish the mould surface off to a high standard. However, if you don't mind polishing up the surface then you should be fine.