You need s non nano zinc oxide , I use this one for years
1 Pound Bag - NON NANO Uncoated - 100% Pure Pharmaceutical Grade
Mix it with rubbing alcohol or any alcohol 75-95%
Until you get slightly milky consistency, something like 2% milk , less is more , you don’t need to make your objects white , just slightly matte , kinds frosting effect what you need.
You can use a simple spray bottle you find at home , or airbrush .
For very big objects you can use even a old Lysol spray bottle for example … shake each time before spraying .
Use a painter brush to clean the object after use , it will works better than water …