Forty Two Feet of Full Body Paint, Booked in Blocks

Our booth is 60 feet long. A 42 foot coach goes in as a single unit, which means the body is sprayed in one continuous pass from front cap to rear cap with no break anywhere. That sounds like a small thing and it is the single largest quality variable on a job this size.

The alternative, which is what happens where booth length is limited, is spraying a coach in two halves with a blend joint somewhere near the middle. A blend joint on a metallic or a pearl is visible in the right light for the life of the vehicle, because metallic orientation cannot be perfectly matched across a break. Any owner comparing quotes on a full body coach repaint should ask exactly one question about facilities, which is whether the unit is sprayed in one piece.

Everything that can come off, comes off. Mirrors, marker and clearance lights, badges, the ladder, bay door handles and latches, license plate bracket, mud flaps, and the awning fabric where the rail can be isolated. Each of those is a fastener count and a labelled bag, and each of them is a hard paint edge avoided. Painting up to a light housing rather than behind it is the difference between a repaint and a refinish.

Then masking. A coach presents an enormous area that must stay clean: the roof membrane, all glazing, tires, the entry step assembly, every vent, and the underside of every flare and skirt. Membrane roofs are the priority because overspray on EPDM cannot be polished off the way it lifts from a painted surface, and cleaning it is a solvent operation on a material solvent damages.

• Every removable exterior fitting off and bagged with labels
• Roof membrane fully covered, treated as the highest risk surface
• Glazing, tires, vents, steps and skirt undersides masked
• Old decals removed rather than masked or painted around

The dark sweep was chalked deeply enough that the surface came off as powder under a dry hand. That layer has to be removed rather than sealed, because chalked gelcoat is a failing surface and paint applied over it adheres to the failure rather than to the substrate. So the body was sanded through the chalk, which on this coach meant more material removal on the dark areas than on the light ones.

The old graphic ridge came out at the same stage. A boundary between two aged finishes at different thicknesses has to be feathered flat, or the new single colour reveals the old scheme as a shadow ridge under the clear. That feathering is slow, careful, unglamorous work, and it is the part of the job that determines whether the finished coach looks new or looks repainted.

Epoxy primer where the substrate was opened, high build primer and block on the repaired areas, then a sealer coat across the entire body. The sealer is the line that gets questioned on every full body quote and it is not optional on a coach whose surface is now four different things: original gelcoat, sanded gelcoat, filler, and fresh primer.

Then base and clear over the whole unit. Base goes on in controlled coats with flash time between them, and on a body this large the flash time is genuine waiting rather than a formality, because the leading edge of a pass has to be ready when you come back to it. Clear follows in two coats. The actual spraying across all stages accounted for four of the nineteen days.

Clear needs to cure before anything touches it, and that time is set by chemistry and temperature rather than by anybody's schedule. Cutting a clear that is not ready produces a surface that looks correct for a month and then shows the sanding scratches as the film continues to shrink. There is no version of this that goes faster.

Then cut and polish, by hand and machine, across the entire body. On a coach this is a genuinely large operation because the surface area is enormous and the panels are flat and vertical, which is the geometry most likely to hold orange peel and dust nibs. Two technicians spent three days on it. That final stage is what people are actually paying for when they look at a finished coach and cannot tell it was ever painted.

The booth is a shared resource and cure time is not booth time. So the coach occupied the booth for defined blocks and sat in a bay elsewhere in the building during cure, and other work went through the booth in between. That is why the quote described blocks rather than a continuous nineteen day occupancy, and it is why moving one block moves everything after it.

Owners sometimes ask to pull the unit out mid job for a trip. On a sectional repair that is occasionally possible. On a full body repaint it is not, because a coach in primer is a coach with no ultraviolet protection and an unsealed surface, and moving it outdoors for a week undoes the preparation it took days to achieve.

1. Hardware removal, decal removal and masking
2. Sanding through chalked areas and feathering the old graphic ridge
3. Body repairs, epoxy primer, high build primer and block
4. Sealer across the whole body
5. Base and clear in one continuous pass front to rear
6. Cure, then cut and polish across the entire surface