There are a few spray options from Koch Chemie for a last step. Koch Chemie Spray Sealant is a spray on and wipe off sealant that creates a hydrophobic surface and adds gloss on painted surfaces, easy to work with and on black paint it darkens and leaves no residue, no streaky-ness.
Includes spray head
Collections: Detail Spray, Koch Chemie GmbH, Last Step QD / WAX