Fig. 1. Samples with paint of cross-sectional and surface image

Fig. 2. Schematic of laser cleaning system and scanning path. (a) Schematic of laser cleaning system; (b) Schematic of laser scanning path

Fig. 3. Finite element model of laser cleaning

Fig. 4. Surface morphology after pulsed and CW mode laser cleaning. Pulsed mode: (a) P_p=100 W; (b) P_p=110 W; CW mode: (c), (d) P_c=100 W; (e), (f) P_c=110 W

Fig. 5. 3D surface profiles after laser cleaning. (a) P_p=100 W; (b) P_p=110 W; (c) P_c=100 W; (d) P_c=110 W

Fig. 6. Surface morphologies after laser cleaning. (a) P_p=100 W; (b) P_p=140 W; (c) P_p=180 W; (d) P_c=100 W; (e) P_c=140 W; (f) P_c=180 W

Fig. 7. FTIR spectrum before and after cleaning

Fig. 8. Micrographs of the surface residual paint. Pulsed mode: (a)-(c) 100 W, 140 W, 180 W; CW mode: (d)-(f) 100 W, 140 W, 180 W; (g) Surface of substrate

Fig. 9. Cross-sectional morphology of residual paint. (a) Pulsed mode; (b) CW mode

Fig. 10. Micrographs of surface debris after cleaning. (a)-(c) Pulsed mode; (d)-(f) CW mode

Fig. 11. Temperature at different depth in the x-axis at t=284 ns. (a) Pulsed mode; (b) CW mode

Fig. 12. Schematic diagram of laser cleaning GFRP surface paint layer. (a) Pulsed mode; (b) CW mode