Automotive Refinishing Technician

Isocyanate hazard = respiratory sensitization risk; Type A cartridge required (not N95); PPE non-negotiable. Memorize this formula and practise substituting values — exam questions often give you three variables and ask you to solve for the fourth.

Nozzle size = spray pattern control; larger for basecoat coverage, smaller for clearcoat fineness. Memorize this formula and practise substituting values — exam questions often give you three variables and ask you to solve for the fourth.

Incompatible paints = adhesion failure; old lacquer under urethane = peeling; strip to bare substrate for safety. Memorize this formula and practise substituting values — exam questions often give you three variables and ask you to solve for the fourth.

Ventilation failure = cumulative toxin exposure leading to occupational asthma, neurological effects; OSHA compliance non-negotiable. Memorize this formula and practise substituting values — exam questions often give you three variables and ask you to solve for the fourth.

Waterborne paint = 50-70% lower VOC than solvent systems; meets modern air quality regulations and reduces worker exposure. Understanding and applying code requirements correctly ensures your installations pass inspection and meet legal obligations in your jurisdiction.

Clearcoat DFT 2-4 mils balances UV protection and flexibility; too thin = fading, too thick = thermal stress cracking. Memorize this formula and practise substituting values — exam questions often give you three variables and ask you to solve for the fourth.

VOC limits 550-680 g/L (varies by region); manufacturers formulate accordingly; higher VOC = health/environmental concern. Understanding and applying code requirements correctly ensures your installations pass inspection and meet legal obligations in your jurisdiction.

Touchup difficulty = feathering orange peel texture; sanding basecoat interface smooth before feathering prevents pattern visibility. Memorize this formula and practise substituting values — exam questions often give you three variables and ask you to solve for the fourth.

Metallic flip angle = color shifts with viewing angle; must validate match at multiple angles to confirm acceptable uniformity. Memorize this formula and practise substituting values — exam questions often give you three variables and ask you to solve for the fourth.

Paint shop waste = hazardous (filters, sludge, solvents); improper disposal = liability and fines; certified disposal required. Memorize this formula and practise substituting values — exam questions often give you three variables and ask you to solve for the fourth.

Clearcoat orange peel = spray technique (high pressure, distance) or viscosity; reduce pressure, increase distance, thin coat prevents. Memorize this formula and practise substituting values — exam questions often give you three variables and ask you to solve for the fourth.

Paint mixing precision = scales/graduated cups essential; approximate mixing = batch-to-batch variation and failed colour match. Memorize this formula and practise substituting values — exam questions often give you three variables and ask you to solve for the fourth.

HVLP efficiency = 8-10 PSI nozzle pressure; higher pressure = excess overspray and wasted material. Memorize this formula and practise substituting values — exam questions often give you three variables and ask you to solve for the fourth.

Base-clear system = separation of color (basecoat) from protection (clearcoat); allows complex finishes and superior UV durability. Memorize this formula and practise substituting values — exam questions often give you three variables and ask you to solve for the fourth.

Booth airflow specs = 50-100 FPM (face velocity); low airflow = overspray escapes, exposing workers and environment. Memorize this formula and practise substituting values — exam questions often give you three variables and ask you to solve for the fourth.

Spectrophotometer = precise colour quantification; adjusts for light source, viewing angle, and allows precise OEM formula matching. Memorize this formula and practise substituting values — exam questions often give you three variables and ask you to solve for the fourth.

Feathering = reduce thickness at edges to prevent visible paint line; proper technique makes blend invisible. Memorize this formula and practise substituting values — exam questions often give you three variables and ask you to solve for the fourth.

Machine polishing = fine scratch removal and gloss enhancement; improper technique can burn through topcoat. Memorize this formula and practise substituting values — exam questions often give you three variables and ask you to solve for the fourth.

Anti-chip DFT 4-6 mils provides stone impact resistance; thinner = no protection against road hazards. Memorize this formula and practise substituting values — exam questions often give you three variables and ask you to solve for the fourth.

Professional refinishing = proper equipment (high-HVLP guns, downdraft booth, color matching lights) essential for quality/compliance. Memorize this formula and practise substituting values — exam questions often give you three variables and ask you to solve for the fourth.

PPF adhesion = clean surface + slight tackiness; primer sealer improves film durability and prevents peeling. Memorize this formula and practise substituting values — exam questions often give you three variables and ask you to solve for the fourth.

Waterborne paint differences = application technique, timing, and humidity control unfamiliar to solvent-trained techs; retraining essential. Memorize this formula and practise substituting values — exam questions often give you three variables and ask you to solve for the fourth.

Refinishing estimate = prep time + application time; metallic/complex colors require multiple coats increasing labor. Memorize this formula and practise substituting values — exam questions often give you three variables and ask you to solve for the fourth.

Grit progression 220→320→500→600 ensures each step removes previous scratches; single grit leaves deep scratches. On the job, a solid grasp of this concept means faster decisions, fewer errors, and work that passes inspection the first time.

Masking QC = verify no gaps at edges; paint bleed under tape = tape failure requiring replacement. Memorize this formula and practise substituting values — exam questions often give you three variables and ask you to solve for the fourth.

Cratering = contamination (silicone from undercoat, wax, oil); prevention = proper surface cleaning/wiping before topcoat. Memorize this formula and practise substituting values — exam questions often give you three variables and ask you to solve for the fourth.

Pre-primer prep = solvent wipe + tack cloth removes dust, silicone, and contaminants preventing adhesion failure. Memorize this formula and practise substituting values — exam questions often give you three variables and ask you to solve for the fourth.

Primer compatibility critical: epoxy on plastic/bare metal, urethane as intermediate; mismatch = adhesion failure. Memorize this formula and practise substituting values — exam questions often give you three variables and ask you to solve for the fourth.

Basecoat→flash→clearcoat while basecoat slightly tacky ensures chemical adhesion; delayed clearcoat = weak mechanical bond. Memorize this formula and practise substituting values — exam questions often give you three variables and ask you to solve for the fourth.

Cross-hatch adhesion test = quantifies paint-to-substrate bond; flaking in grid = adhesion failure requiring investigation. Memorize this formula and practise substituting values — exam questions often give you three variables and ask you to solve for the fourth.