Simply SP-023 Clear Lacquer Varnish Gloss Aerosol Spray – For Use on surfaces treated & untreated on Metal, Aluminium, Glass, Stone & Various Plastics – 500 ml : Amazon.co.uk: DIY & Tools
Automotive Spray Paint Clear Lacquer High Gloss Clear Coat Aerosol Spray Paint Car Paint Varnish Spray - China Clear Coat, Varnish | Made-in-China.com
paint - Why did my clear coat turn out matte instead of glossy, and how can I fix it? - Motor Vehicle Maintenance & Repair Stack Exchange