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Paint correction or a respray

Name: JetRefined
Address: Atlanta, GA, US
Telephone: (770) 999-9740
Price range: $$$

Correct the paint while the film is intact. Once the clearcoat is failing rather than merely dull, polishing is a delaying tactic and the right move is to plan the repaint. Correction addresses defects inside the film. A respray replaces the film itself, and with it the corrosion barrier and the first proper look at the structure underneath. The deciding question is not how the paint looks. It is whether the coating is sound.

The short answer

Correct while the film is sound. Once the clearcoat itself is failing, polish is a delaying tactic and the repaint is the job you are actually buying.

compared with
	Paint correction	Respray
What it addresses	Defects inside an intact film: swirl, wash marring, oxidation, haze, etched exhaust staining	The film itself. A new paint system built back up from the prepared substrate
Method	Staged machine polishing that levels a measured amount of clearcoat, then protection over the result	Strip, surface preparation, primer, basecoat, clearcoat and cure, in a shop under controlled conditions
Downtime	Crew-days, worked to your schedule at your hangar, often overnight around trips	Typically five to seven weeks out of service, on the paint shop's slot rather than yours
How long it holds	The defects stay gone until new ones are put in; gloss holds as long as the protection does	A full interval. Commonly five to seven years before the next one, nearer four where salt air is a factor
Risk	Spends clearcoat that cannot be replaced without a repaint. Over-correction is permanent	Composite panels flex in flight, so film thickness must be specified correctly or the paint cracks and etches within a year
Corrosion	Cleans and protects the surface. Does nothing about corrosion already tracking under the film	Strips the film, so what is underneath is finally visible, treatable and documented
What the spend buys	Crew-days against a consumable film, and entirely wasted if that film is already failing	A capital event on the airframe, carried mostly by the weeks of lost availability rather than the invoice

Correction works inside the film. A respray replaces it

There is a clean technical line between the two. Correction removes defects within an intact film by levelling the clearcoat around them down to the base of the defect. That only works when there is sound, adherent film to level into. Aerospace basecoat and clearcoat systems build to roughly two to two and a half thousandths of an inch of clear, and that is the entire working budget for the life of the paint. It cannot be topped up. If the clearcoat is delaminating, crazed, chalking through to basecoat, or showing filiform corrosion tracking underneath, there is nothing sound to work into and abrasives have nothing to offer.

The repaint interval is a real number, and it bites

Paint manufacturers commonly recommend strip and repaint in the region of five to six years. Wider industry practice runs to about seven, with ten treated as the outside limit, and roughly four years where salt air is a factor. Running past the interval is not free. Corrosion develops under paint and stays hidden while the paint hides it, so the repair that eventually follows is more invasive than the repaint would have been. FAA AC 43-4B makes the point from the other side: filiform corrosion under paint is inhibited by storage below 70 per cent relative humidity and by washing off acidic airborne contaminants. Washing is not cosmetic maintenance. It is how an aircraft reaches its interval in a condition worth repainting.

What choosing wrong costs, in both directions

Correction on failing paint postpones the same decision by a few months. The chalk returns, the delamination carries on, and clearcoat the sound areas still needed has been spent on areas that are going to be stripped anyway. In the other direction, a respray on a finish that is merely tired takes five to seven weeks of availability you did not have to give up, and for a working flight department that downtime is the dominant cost regardless of what the shop invoices. The expensive mistake is rarely choosing the bigger job. It is buying the smaller one twice.

Composite panels do not behave like aluminium

Composite components require very specific film thicknesses, and because they flex in flight, paint that is wrongly specified on composite can crack and etch within a year of application. That cuts both ways. A respray quote that treats fairings, control surfaces and other composite panels as the same job as the fuselage skin is not a quote worth accepting. And correction over composite, already at a lower film build, has less margin than the metal either side of it. Readings are taken panel by panel for exactly this reason, not once on a door and applied to the airframe.

What changes the answer

Where the aircraft lives and how often it is washed move the interval before anything else does. Salt air shortens it. So does an aircraft washed only when it starts to look bad, because acidic deposits sit on the finish in between. Paint history counts for as much: how old the system is, whether it has been corrected before and how many times, and what the film reads now. A dark or high-contrast scheme shows every defect and invites one aggressive pass, which is the quickest way to spend material you will want in three years. If the aircraft is heading to market, the calculation shifts again, because a buyer prices the age of the paint whether or not it has just been polished.

The single-pass version is a different product, not a shorter one

Correction at a professional standard is measured before it starts, worked in staged passes matched to the paint system and its repaint history, and finished with protection so the result holds. That is crew-days, and it is priced as crew-days. The compound matters as much as the machine. Liquid waxes, polishes and polishing compounds intended for aircraft are qualified to standards such as Boeing D6-17487, whose battery includes seven-day sandwich corrosion testing between faying aluminium surfaces and a hydrogen embrittlement test to ASTM F519, four notched cadmium-plated specimens immersed for 150 hours at 45 per cent load. A consumer store product has not passed a test it was never submitted to. The afternoon job that reaches gloss by lunchtime is a different product: it gets to the same shine by removing more material, and the material does not come back. Bring a seven-year repaint forward to four and the difference is paid into a paint shop invoice and five to seven weeks of lost availability.

Choose when

Choose correction when the film is sound: adhesion good, no crazing or chalking that returns, and measurable clearcoat left to work with. Swirl from poor wash technique, light oxidation, exhaust etching and wash marring are all defects inside the film, and they come out. Correct, protect, and the paint reaches its interval in the condition it should be in.

Choose when

Choose the respray when the film has failed. Delamination, crazing, chalk that returns within weeks of polishing, filiform corrosion tracking under the paint, or a finish already past the manufacturer's recommended interval. None of those are polishable, because abrasives need something sound to level into. Book the slot, accept the five to seven weeks, and get a proper look at the structure while it is bare.

Questions we get on this

Can correction deal with corrosion showing under the paint?: No. Filiform corrosion tracks between the paint and the metal, and correction only works on the surface above it. Polishing makes it less visible for a while and does nothing to the corrosion, which carries on underneath. Once it is visible through the film, the decision belongs to a paint shop.
How many times can an airframe be corrected?: A finite number, and the number depends on what is left. Aerospace clearcoat builds to roughly two to two and a half thousandths of an inch, and every correction spends some of it. That is why film thickness is measured before work starts. An aircraft corrected every year is on a shortened path to a repaint.
Will a respray pay for itself at sale?: Treat it as protecting the number rather than raising it. Buyers price paint age and condition, and an aircraft visibly due for paint is marked down for it. New paint on an airframe already at its interval removes that deduction. A fresh scheme on a finish that is still sound does not do the same work.
We are two years out from a planned repaint. Is correction wasted money?: No, that is the best case for it. Correction and protection keep the aircraft presentable until the slot comes up, and regular washing removes the acidic deposits that drive corrosion under the film. The instruction we give our own crews is to take the minimum material that gets the result.
Can you tell which we need from photographs?: Usually we can narrow it, and we will not decide from them. Film thickness readings across the panels, and how a test section responds to a single staged pass, settle it on the aircraft. If the answer is a paint shop, you will be told that rather than sold a correction.

Send the tail number, the airport and the paint's history: when it was last done, and by whom. We will look at it, take film readings panel by panel and tell you which of the two you are actually buying. If the answer is a paint shop, you will hear that instead.

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Other decisions

vs Dry wash between trips, wet wash when the soil load is heavier than film. Neither one substitutes for the other, and that line is drawn by what each method removes, not by preference. vs Rinse-less, unless the ramp allows no water or the airframe carries nothing more than a dusting. It takes a wider band of soil and it is the gentler of the two when it is done to method. Dry wash is the right answer inside its limits and a poor one outside them. vs Coat paint you intend to keep. On paint already booked for the shop, wash it correctly instead and coat the new finish while it is perfect. vs Correct the paint only when the gauge shows the film can afford it; if a repaint is within a year or two, or the paint has already been polished more than once, live with the defects and protect what is left. vs Maintenance is how you reach the repaint interval in good condition, not how you avoid it. If the paint is due, paint it. vs Keep routine washes and cabin resets in-house where your crew is trained and doing them weekly, and contract correction, coating, brightwork and recovery work out, because those are a different job to washing and the deciding factor is not skill, it is who carries the loss.

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