I-CAR ProLevel Refinish common mistakes
I-CAR ProLevel Refinish · Understand the traps and how to avoid them.
Treating a two-part primer or clearcoat as usable for the whole workday once it is mixed, and spraying material past its stated pot life because it still pours and looks normal.
Candidates memorize mix ratios but not pot life, or assume a slow thinner or cooler shop extends usable life. In reality gel time and viscosity drift make the film flow out poorly, trap solvent, and lose adhesion, so the failure only shows up later as peeling or blushing.
What to do instead
For each product, write the mix time and the pot-life expiry on the container lid and discard at expiry regardless of appearance. Learn the difference between pot life and induction time, and check the product data sheet for the temperature the pot life was measured at.
Sanding a blend or repair area with a grit that is too coarse and then applying sealer or basecoat directly over the scratches without stepping up through finer grits.
Candidates want to save time and believe high-build primer will fill the scratches. Coarse scratches telegraph through thin basecoat and clearcoat, and residual sanding scratches swell later, producing a visible map or sandscratch swelling defect.
What to do instead
Follow a grit progression to the finish recommended for the substrate and coating system, and inspect with a wet check or a guide coat before priming. Use a guide coat on every repair and confirm all scratches are removed before sealer.
Identifying a plastic part or a substrate as bare steel or OEM finish without testing it, then using the wrong adhesion promoter or primer.
Candidates rely on appearance or vehicle make rather than isolation testing, and many plastics look identical to painted metal. Wrong primer choice causes lifting, peeling, or solvent attack, especially on polypropylene and other low-surface-energy plastics.
What to do instead
Use a magnet and an isolation test on an inconspicuous area, and check for a flexible plastic part by feel and by product identification markings. Match the adhesion promoter and primer to the identified substrate per the product data sheet before any sanding or coating.
Mixing basecoat or clearcoat by eye or by counting pumps without confirming the ratio with a mixing cup or scale, and skipping the reducer selection based on shop temperature.
Candidates learn ratios as a number but not as a measurement discipline, and they reuse a reducer already on the shelf. Off-ratio material shifts color, gloss, and cure, and the wrong reducer speed causes solvent pop, die-back, or dry spray depending on temperature.
What to do instead
Measure every component with a graduated mixing cup or scale and record the ratio, then select reducer or activator speed for the actual booth temperature. Keep a mixing log and verify the batch before spraying.
Spraying without checking gun setup: wrong fluid tip and needle for the product, incorrect inlet pressure, or a fan pattern that is too wide or too narrow for the panel.
Candidates set the gun once and never revisit it, or they adjust pressure by ear. A mismatched tip and pressure combination changes atomization, causing orange peel, dry spray, runs, or uneven metallic orientation that no technique can fully correct.
What to do instead
Before each job, confirm the recommended tip size and inlet pressure from the product data sheet, set the fan to the panel size, and test the pattern on paper. Recheck pressure at the gun inlet with the trigger pulled, not at the regulator.
Applying basecoat in wet, heavy coats to cover faster, and holding the gun too close or moving too slowly on the final coat.
Candidates chase hiding power and try to save passes. Wet basecoat coats trap solvent, cause mottling and metallic striping, and heavy final coats create runs and longer flash times that disturb the metallic orientation and color match.
What to do instead
Apply basecoat in thin, uniform medium-wet coats at the recommended distance and overlap, and let each coat flash fully. Build hiding with additional coats rather than heavier ones, and keep the final coat consistent in speed and distance across the panel.
Matching color under the booth lights or a single light source and skipping the spray-out panel, then discovering a mismatch in daylight.
Candidates trust the variant chip or the mixing bank formula and assume the vehicle is the original color. Metamerism, faded OEM finishes, and variant differences make a booth-only match look wrong in sunlight, and the error is expensive after clearcoat.
What to do instead
Spray a spray-out card of the mixed color, compare it to the vehicle under daylight or a color-corrected light, and check it from multiple angles for metallics. Adjust the variant or tint before clearing, and document the formula and variant used.
Skipping or shortening the flash time between coats and between basecoat and clearcoat because the surface looks dry to the touch.
Candidates equate a dry surface with a fully flashed film. Trapped solvent under the next coat causes solvent pop, pinholing, and die-back, and rushing the clearcoat over damp basecoat produces blistering or loss of gloss.
What to do instead
Follow the data sheet flash times at the actual booth temperature, and add time in cooler conditions rather than subtracting it. Use a consistent coat count and wait for the full recommended interval before clearcoat.
Handling and storing two-part isocyanate products, gun cleaning solvent, and spray waste without the required PPE and containment, and mixing waste streams.
Candidates focus on the spray task and treat cleanup as low risk, or they assume the booth extraction covers everything. Isocyanate sensitization, solvent exposure, and improper hazardous waste disposal are the highest-consequence compliance failures on the job.
What to do instead
Use supplied-air or the specified respirator with a fit check, gloves, and eye protection for every mix and spray, and clean equipment in a designated area with containment. Segregate hazardous waste by the shop's waste plan and keep SDS access current.
Documenting the repair loosely: no record of products, batch numbers, mix ratios, or the test panel used, and no note of the color variant or tint adjustments.
Candidates treat documentation as paperwork after the job and rely on memory. Without records, a comeback cannot be traced to a product lot or mix error, and warranty or customer disputes have no evidence of what was applied.
What to do instead
Record product name, batch or lot number, mix ratio, reducer speed, coats applied, and the color variant and tint adjustments on the repair order as work proceeds. Keep the spray-out card labeled with the formula and attach it to the job file.