Light Grey printing issues

Just tried my first spool of Light Grey PETG and there is a strange appearance to the print, certain areas almost look like there is air under them or something. Layer adhesion and other properties are good but the blotchy appearance won't work for this project. Is there a setting I can change to help?

I am using a Bambu P1s printer:

80°c bed temp

.4mm nozzle

255°c nozzle temp.