i posted this on cb7, but i thought you guys should know about it as well.
*note* only polish hard plastic. it will turn into power when sanded. the softer plastic will not powder and will be difficult to polish. if it is flexable it is to soft. there are not a lot of things on the car that are hard plastic. most of the interior is soft plastic. test on unseen areas first. do not use anything other than hand sanding. machine sanding may make the plastic melt.
for taillights, blinkers,you shouldn't have to sand. that is usualy only for sanding the texture off the interior pieces. only sand in extreme cases(deep scratches, nicks, blemishes, ect.) you can use mag and aluminum polish first, then use the plastic polish to make it crystal clear.
i recomend a drill with a buffing attachment to cut out a lot of work.
materials:
-plastic polish
-sandpaper (600g-800g-1000g)
-cotton polishing cloth
this is to show you how to polish plastic in and around your car. this is the plastic blank in the dash trim. to polish it, begin by sanding the texture off of it with 600g sandpaper til the texture is smooth. then follow with 1000g to knock it down some more and smooth it further.
this is what it will look like after sanding
now you are ready to use the plastic polish. apply it to the polishing cloth and buff until all the fine scratches disappear and a reflective finish appears. it should look like this when done.
clock
here are some more: the seat levers. a before pic\/
after\/
a side by side comparision of before and after.\/
later.
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