Coloured plastic rear vision mirrors, For example, the red Outback and red GT4 only have a thin layer of colour coded plastic, and if they were scratched as deep as the ute mirror, you would be able to see black coloured plastic under the coloured plastic scratches,
I have restored coloured mirrors, depending on the damage, , which are usually a “flat surface”,
1, sand coloured plastic mirrors scratches, fill with body putty and respray with paint ,
2, repair “deep” scratches in coloured mirrors in the same manner a filling scratches in body panel paint,
3, remove or sand off the colour plastic skin, or layer to the black plastic as above, and buff,
4, weld filling the scratch with same colour plastic rod, (red black white, ( home made, ), and sanding and buffing as above,
Patterned plastic surfaces on mirrors is common and variable, so if you are just interested in fixing your own scratched pattened mirrors, you may be interested in the following,
2008, Ford, rough texture surface and flat surfaces,
2000 Toyota hilux, these type mirror get scratched all the time,
12 Toyota Hilux,
Please note the patterns are slightly different, in each plastic mirror,
Red lines show where similar scratches (as above ) could have happened, in which case I would sand the area p240,p600,p1500 to p2000 orbital sander, buff basically flat with-in the blue line, then using this,
Hot air gun,
Please note, yellow arrow shows variable Temp control, red arrow shows variable hot air flow, also please note, settings are set for around plastic mirrors,
At this point I could start listing temps for different plastics used in mirrors and bumpers or plastic welding ect, but my line of thought is the easiest way find the correct temperature for melting, or moulding, the plastic you have in your hand, is by raising the temperature slowly, until that or your plastic appears wet, or the surface of the plastic melts, without over heating the heated area where the heat is applied, which causes distortion,
So, I heat a small area of sanded mirror plastic quickly to no more than melting temperature, and move the gun away, and pat the hot plastic surface with my finger and palm prints as the plastic cools, yes it is hot, but a quick fix for applying a pattern back onto the sanded and buffed flat plastic area, a quick buff usually blends the finger printed area with the surrounding area,
Yellow arrows show good fine black plastic pattern, no scratches or stone chips, (city low k, work ute, )
Orange circle shows, the area with-in the orange circle has good pattern and rounded shape surface, so if I want to restore the or a pattern near perfect, I would go to wreckers and find a damaged mirror same model year and pattern required, and cut out this small section ( orange circle, ) and use that as a pattern stamp, ( no burnt fingers, ),
Again, So I heat a small area quickly to no more than melting temperature, and move the gun away, and pat the hot plastic surface with my small (orange area ) original pattern stamp, because I keep the stamp in a small bucket of cold water, the stamp is cold when pressed and held for a few seconds against the molten plastic surface, the pattern is transferred and quick cooled to ensure detail, the stamp stays in the bucket to be keep cold or cool.
I suggest only stamping small areas, at a time, then removing the heat source for a few minutes, and or even directing a fan on to the whole mirror or bumper, while stamping sanded areas, I try to keep the mirror or bumper cool, and not allow the whole mirror to build up heat, over a large area,
Please also note, flat shinny surface plastic mirror plastic can be re-patterned if that was required,
Pease also note, the above heat gun function of applying a slow flow volume of heated air most suitable for plastic hot pattern stamping, and welding, could be possibly simulated by using a quality hair dryer with high and low temp control and air flow control. “If” fitted with a nozzle similar to the nozzle,
The nozzle would only deliver a slow flow of air, and diverting away un-needed air flow and some heat,
Warning, over heating plastic quickly burns plastic molecules, even a little too much heat, and white or red and most colours will fade, and lose their true colour,