Choose by Your Budget
Don’t get lost in options. One starter pick, one best-value pick, one professional pick.
Before & After
Spray Painting Effects From Real Customers
Customers Reviews
Parts & Accessories
FAQs - Auto Refinishing
Q1:What spray gun nozzle size should I use for automotive base coat?
A:For base coat, we recommend a 1.3mm nozzle (PRD-815or PRD-716). It delivers the optimal balance of atomization and flow rate for water-based and solvent-based basecoats. Avoid going larger than 1.4mm for base coat — it increases the risk of runs and uneven metallic flake orientation.
Q2:What air compressor do I need to run a PORPHIS spray gun?
A：Air compressor requirements vary by the atomization technology of your specific model:
LVLP models (PRD-510, MPH-338): Require 8–12 CFM at 29 PSI. A standard 20–30 gallon compressor with a 2–3 HP motor is sufficient. Best choice for home garages and small shops with limited compressor capacity.
MP models (PRD-715, PRD-815): Require 10–14 CFM at 29–36 PSI. A mid-range compressor (25–40 gallon, 2.5–3.5 HP) handles MP guns comfortably, delivering superior atomization quality with moderate air consumption.
VS Split Nozzle models (PRD-817, PRD-717): Require 15.2 CFM at 29 PSI. A larger compressor (30–60 gallon, 3–5 HP) is recommended for sustained professional use. The VS Split Nozzle delivers the widest, most uniform fan pattern in the PORPHIS lineup — optimized for full-panel automotive refinishing.
HVLP models (PRD-716，PHS-156): Require 15+ CFM at 45 PSI. A larger compressor (30–60 gallon, 3–5 HP) is required for continuous large-area coating work.
Check your specific model's data sheet for exact CFM and PSI requirements before selecting a compressor.
Q3:What nozzle size is best for clear coat?
A：Clear coat is thicker and requires more flow. Use a 1.3mm–1.4mm nozzle for standard clear coats. For high-solids or thicker clears, 1.4mm gives you better flow without sacrificing atomization. The PRD-817 with a 1.3mm VS Split Nozzle handles most professional clear coat applications cleanly.
Q4: Should I use a 600ml or 1000ml cup for auto refinishing?
A: 600ml aluminum cup for most automotive work. The lighter weight reduces arm fatigue during full-panel spraying, and better weight balance improves gun angle control — critical for even metallic flake lay. Use the 1000ml cup only for large commercial jobs (full truck bodies, fleet vehicles) where stopping to refill would interrupt a wet coat.
Q5: How many coats of base coat and clear coat should I apply?
A: Standard automotive refinishing protocol: 2–3 medium coats of base coat with proper flash time between each, followed by 2–3 coats of clear coat. Always follow your paint manufacturer's data sheet for flash times and film build recommendations — these vary significantly between brands and product lines.