Preparing a Classic Car for a Show

By Diagnostic Tools Every Enthusiast Should Consider
Comments 35
5 Jul 2026

Reliability First, Shine Second

A show is a poor place to discover a fault. You will sit in queues, idle for twenty minutes at a time, crawl over gravel, and then expect the car to start on a hot day with a hundred people watching. So the preparation should begin a fortnight before the event, not on the morning itself.

Take the car on a proper shakedown run of twenty to thirty miles. Include slow town traffic, a stretch of dual carriageway, and a few hard stops. Listen for new noises, watch the temperature gauge, and check under the car as soon as you park. Anything that has become worse — a rattle, a spongy pedal, a slow weep from a hose — should be sorted now rather than noted for later. A classic that arrives under its own steam, idles evenly and restarts without fuss will always draw more goodwill than a trailer queen that cannot be moved.

Fluids, Fasteners and the Job of Work

Work through the car systematically and treat it as a service rather than a cosmetic exercise.

Check engine oil level and condition, plus gearbox and differential levels if the car has separate fillers. Dark brake fluid with a high moisture content will boil in traffic, so renew it if it has not been changed in two or three years.
Squeeze every coolant hose. If it feels crunchy or the jubilee clips have cut into the rubber, replace them. Carry a spare top hose and a fan belt if they are not freely available off the shelf.
Grease trunnions, kingpins, propeller shaft nipples and handbrake linkages with the correct specification grease, not whatever is nearest in the garage.
Rock the wheels top and bottom to check wheel bearings, and inspect the tyres for sidewall cracking. Tread depth is far less important than age on a car that covers few miles; rubber over seven years old should be treated with suspicion regardless of appearance.
Clean and gap the points, or check the electronic ignition connections, and top up the carburettor dashpots. Check the spark plugs have the correct colour and the timing has not drifted into pinking.
Inspect battery terminals, the earth strap and the alternator or dynamo belt. A weak earth can bring a whole day to a halt.

The Details People Actually Look At

Enthusiasts and judges share the same habit: they crouch down. Wheel arches, inner wings, the boot floor, the underside of the bonnet and the area around the fuel tank are all fair game. Clean these properly with a stiff brush, a mild detergent and plenty of rinsing. Avoid blasting high-pressure water at old wiring, distributor caps and ageing seam sealer — it drives moisture into places it will not easily leave.

Dry everything thoroughly, then apply a light dressing to rubber and plastics and a thin smear of protective wax to bare metal. Restraint is the watchword. An engine bay dripping with silicone looks desperate, and it attracts dust on the drive home. A clean, dry, correctly finished bay looks honest.

Paint, Chrome, Glass and Trim

Wash the car in the shade and out of direct sun. Use two buckets, work top to bottom, and rinse the mitt often. If the paint feels rough, a clay bar will lift the contamination that washing leaves behind, but go gently around panel edges and raised swage lines where the paint is thinnest. Fibreglass bodies need particular care; they hold heat and polish differently from steel.

Chrome and stainless respond well to a light clean and a buff with a soft cloth. Excessive polishing wears through the plating. Glass should be cleaned inside and out with a dedicated glass cleaner, and the wiper blades replaced if they smear. Door shuts, badge recesses, grille slats and the gaps around lights collect dirt that shows up badly in sunlight — a soft detailing brush and a few cotton buds will deal with them. Inside, vacuum the carpets, feed leather sparingly, and treat vinyl and wool cloth with products suited to each.

The Kit Worth Packing

A modest spares box earns its place in the boot on every outing:

Basic tools, a torch, insulation tape, cable ties, wire and a few jubilee clips.
Spare fan belt, bulbs, fuses, a length of fuel hose and a can of coolant or water.
Jump leads, a small fire extinguisher and a warning triangle.
Oil, a funnel, disposable gloves and rags.
A groundsheet, folding chair, umbrella, sun cream and plenty of water.
The workshop manual, plus a folder of receipts and history if you have it.

Enjoy the Day Itself

Concours trophies are pleasant, but most classic owners are there for the conversation, the smell of hot oil and the sight of an MGB or a Spitfire being used exactly as intended. Aim for a car that is clean, tidy, mechanically sound and clearly cared for, and accept that a few stone chips and a mildly worn seat are evidence of a life well lived.

Arrive early, park considerately, and resist the urge to polish for six hours. Talk to people, let children look inside, and answer questions patiently. Keep a notebook for the small jobs you spot during the day, then drive home at a sensible pace and deal with them at your leisure. That is what keeps a classic in regular use rather than confined to a garage between shows.

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5 Comments

Robert Sonny says Jul 21, 2024 at 10:00am

I must explain to you how all this mistaken idea of denouncing pleasure and praising pain was born and I will give you a complete account of the system
Reply
- John Abraham says Jul 21, 2024 at 10:00am
  
  I must explain to you how all this mistaken idea of denouncing pleasure and praising pain was born and I will give you a complete account of the system
  Reply
  - Robert Sonnysays Jul 21, 2024 at 10:00am
    
    I must explain to you how all this mistaken idea of denouncing pleasure and praising pain was born and I will give you a complete account of the system
    Reply
Robert Sonny says Jul 21, 2024 at 10:00am

I must explain to you how all this mistaken idea of denouncing pleasure and praising pain was born and I will give you a complete account of the system
Reply

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