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Gold Coast: the worst combination — salt plus high UV
The Gold Coast stacks coastal salt onto Queensland UV, which is the harshest realistic environment for a vehicle decal in Australia. Laminate is essential rather than optional. Salt also means edge preparation matters: any wax, polish or salt film left on the panel stops the adhesive keying, and that edge is exactly where salt then gets in. Wash with plain soapy water, rinse, dry fully, then apply.
