Classic car colour is a different discipline from modern refinishing. The factory colour on a 1969 Porsche 911 was mixed from different pigments than any modern equivalent. It aged in a different way. The sheen of a correct Bahia Red on a '69 S is nothing like a modern basecoat mix of the same code.
For concours-level restoration, this matters enormously. For a sympathetic driver restoration, it matters somewhat less — but you still need to start with the right conversation.
Period-correct: what it means in practice
A true period-correct restoration means matching the colour as it left the factory, not as the code appears in a modern system. We use BASF Glasurit's archive mixing formulas for OEM codes where they exist, and spectrophotometer analysis of original surviving paint on the car where they don't.
On cars that have had multiple resprays, we'll typically strip a protected area — inside a door jamb, under a rubbing strip — to find original paint for sampling. Modern mixing systems match to 0.1 ΔE, which is below the threshold of human perception.
When to deviate
Some owners want the original code but want it to look like the car did when new, not as it looks after 50 years of fading. This is a legitimate choice. We tint from the archive formula toward the fresh appearance, document both the original reading and the tinted mix, and note it in the paperwork.
Others want a sympathetic update — keeping the character of the period palette but choosing a colour that wasn't available on their model. This is fine. Just don't call it a numbers-matching restoration.
The colour sample
Every restoration at Bessoni Customs gets a colour sample card — a 150 × 100 mm metal panel sprayed with the exact system used on the car. This lives with the documentation. If the car needs a door panel matched in 20 years, the sample is the source of truth.