I'm used to cutting metal and well obviously plastic doesn't act like metal. I'm having difficulty getting good results cutting plastics in the car. Does anyone known of some good you tube videos or something else. I'm looking for a tips and tricks type video because I think I'm going about it all wrong.

 

What plastic are you cutting? Hard or flexible?

 

Interior plastics. Hard plastic. I notice some have ABS stamped in them while others do not have material marking.

 

I have one of these.
If you have a Harbor Freight near you its a must have tool.
Harbor Freight tools can also be bought on line.
Don't let the price fool you. Its very well made.
Tool = http://www.harborfreight.com/oscilla...ool-62279.html
Video =

 

I have used a dremel with a drill bit in it. It sort of melts the edges back together as you go and will require a bit of razor trimming or light sanding. It works pretty good though.