White rust spots? 6 weeks into flower

[iLuv2BlAzE]

I got 1 or 2 leaves with this white rust patch its 6 weeks into flower using organic nutrients alaska fish and alaska morbloom. Is it a calmag deficiency or salt build up any input highly appreciated thanks

 

[Noonin NorCal]

Looks like light burn, could be from water on the foliage

 

[iLuv2BlAzE]

Ok thanks noonin norcal highly appreciated