My front door gets full intense sun mid afternoon and all evening but no rain at all, as is under a porch. I have just done the grey undercoat and it looks great - the matt finish suits the stained glass window really well. Given it never gets water, does it matter what finish I have on the door? Can anyone advise a paint finish that will stand up to the intense sun. To be honest, the high gloss we had on before cracked in the sun and looked bad quickly. Or will all finishes behave the same.