NITA Panel Beating & Spray Painting Trade Test common mistakes
NITA Panel Beating & Spray Painting Trade Test · Understand the traps and how to avoid them.
Handing in a job card with no signed customer authorisation for additional work, and no record of the vehicle's condition (existing damage, fuel level, odometer, accessories) at intake.
Candidates treat the job card as a parts list and rush the intake conversation because the customer is in a hurry; they assume the assessor only looks at the repair itself, and they have never seen how a supplementary-authorisation dispute is settled in a real shop.
What to do instead
Before touching the vehicle, complete the intake block in full: registration, VIN, odometer, fuel gauge reading, a written note of pre-existing damage with its location, and a customer signature for the original scope. Any extra work found later gets a second line on the card with cost, a reason, and a fresh signature or documented phone approval with time and name. Practise this on a full walk-around so the sequence becomes automatic.
Spraying without confirming that the booth is in extraction mode, that filters are clean, and that the correct respirator with fresh cartridges and a fit check is worn; mixing and gun cleaning are also done outside the booth with the door open.
Candidates focus on the visible result (the finish) and see PPE as an inconvenience; they copy shortcuts from busy technicians and do not connect isocyanate exposure or solvent vapour to delayed asthma and fire risk.
What to do instead
Build a fixed start-up checklist: booth extraction on and interlock proved, manometer or filter condition checked, respirator fit-checked (cover the filters and inhale to confirm seal), gloves and coveralls on, and all mixing and gun washing done inside the booth or a ventilated mixing room with lids kept on containers. State the checklist aloud during the practical so the assessor sees the reasoning, not just the result.
Using a grinder with the guard removed or the wrong disc, holding small panels by hand instead of in a vice or clamp, and leaving the air line unsecured so it whips when disconnected.
Candidates want speed and access to tight areas, and they underestimate the stored energy in a bonded disc or a charged air hose. They also skip the pre-use inspection because the tool 'worked yesterday'.
What to do instead
Before every power-tool task, inspect the lead, plug, guard and disc rating, fit the side handle, clamp the work, and check the hose is fitted with a whip-check or safety coupling. Demonstrate the correct stance and two-hand grip; never wear gloves near a bench grinder or drill press. Name the specific hazard and control to the assessor as you set up.
Diagnosing damage from the outside only: quoting and repairing a deformed panel without checking shut lines, measuring the body, or inspecting inner panels, rails and mounting points for creasing or movement.
Candidates are trained on cosmetic dent removal and are not confident with a tape measure, tram gauge or dedicated measuring system, so they avoid measurement and rely on visual judgement; hidden structural damage then reappears as poor gaps or tyre wear after delivery.
What to do instead
Follow a fixed sequence: record gaps at four points per aperture before disassembly, inspect inner panels and underbody, then take at least three comparative measurements (diagonal, datum, or manufacturer control points) and write the readings on the job card. Only then decide whether the panel is repaired or replaced, and note the decision and its reason in the estimate.
Applying body filler over bare steel that has been touched with bare hands, over old paint edges, or too thick in one pass; then sanding with a block that is too small or using a coarse grit that leaves deep scratches under the primer.
Candidates chase speed and a smooth feel by hand rather than reading the surface; they do not know the maximum recommended filler thickness or the difference between shaping and finishing grits, and they skip the degrease and keying step.
What to do instead
Sequence it explicitly: strip to bare steel, feather the paint edge back well beyond the repair, degrease, apply the filler in thin passes within the manufacturer's thickness limit, shape with 80 grit on a firm block, refine with 120–180, then prime and guide-coat. Use a block long enough to bridge the repair so hollows show up. Check flatness with a straight edge and hand feel before declaring the panel ready.
Mixing paint by eye or by counting 'glugs' rather than by weight or a measuring stick, and setting the spray gun by sound instead of by test pattern.
Candidates have seen experienced painters work fluidly and mistake that fluency for improvisation; they also lack practice with viscosity cups, mixing ratios and the relationship between fluid tip size, pressure and pattern width.
What to do instead
Always measure with a graduated stick or scale, record the ratio, batch and pot life on the job card, and check viscosity with a cup when the product data sheet requires it. Set the gun on scrap panel: adjust pressure at the gun inlet with the trigger pulled, then open fluid and air until the pattern is even with no tails or centre-heavy banding. Keep the test card as evidence.
Blaming the paint when a defect appears: calling solvent pop 'bad material', or polishing out runs and orange peel without identifying the cause, and continuing to spray the rest of the vehicle with the same settings.
Candidates learn defect names from a chart but not the causal chain (film thickness, flash time, booth temperature, gun distance, reducer speed, contamination), so they cannot reason from symptom to cause under exam pressure.
What to do instead
For each defect, state cause, prevention and cure in that order. Example: solvent pop comes from too-thick coats or too-short flash with a fast reducer; prevent it with thinner coats, correct reducer and adequate flash; cure it by sanding back and recoating, not by polishing. Stop the job, inspect the test card, and correct the variable before continuing.
Matching colour under the booth's white light only, or on the wrong panel, and delivering a vehicle with a blend that is visible in daylight or under a petrol-station light.
Candidates assume the colour code guarantees a match and forget that variant chips, fading, and application differences (gun distance, pressure, film build) change the final appearance; they also test on a vertical panel when the repair is horizontal.
What to do instead
Use the variant chips or camera/spectrophotometer reading, then spray a spray-out card and compare it in daylight, under a colour-corrected lamp, and at a low angle against the adjacent panel in the same orientation as the repair. Adjust the blend, tint or blend distance before committing to the whole panel, and record the variant used on the job card.
Welding or bonding without preparing the joint: not removing coating and underseal from the weld zone, not checking the panel is earthed, and not clamping or measuring before a structural joint is made.
Candidates are anxious about burning paint or distorting the panel, so they weld quickly on unprepared metal; with adhesives they skip the primer and clamp-time discipline because the bond looks fine immediately.
What to do instead
Prepare and prove the joint first: strip coatings back to bare metal on both faces, apply weld-through primer where the data sheet allows, earth directly to clean metal near the weld, tack and check alignment and gaps before seam welding, and use a stitch pattern with cooling time to limit distortion. For bonding, follow the adhesive data sheet exactly: abrasion, primer, bead shape, clamp or rivet time, and full cure before handling.
Refitting trim, glass and accessories without a final quality gate: no check that clips, seals, drainage and electrical connections are correct, and no road test or water test before handover to the customer.
Candidates are relieved the paint is finished and rush reassembly; they treat the final assembly as unskilled work and do not know which items (windscreen bonding cure time, door drain holes, boot seals, ADAS sensor calibration) cause comeback complaints.
What to do instead
Use a written final-assembly checklist: all fasteners and clips accounted for, seals seated and drain holes clear, glass bonded to the specified bead and cure time, electrical functions tested, gaps re-measured against the intake record, and a water test and short road test completed. Photograph the finished gaps and record the checks on the job card before inviting the customer to inspect.