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Cutting out complex shapes. What tool?
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Nannuu:
If you want it to look really nice I'd suggest buying a bushing guide set for your router.
Dexter:
I've a rotozip thats handy enough for cutting comlex shapes. Its no precision tool though.

Dexter
PetitMorte:
You may also want to consider a jig saw.  They are very good at curves and angles, and you could use it to cut out most of the hole stuff before using a dremmel for the itty bits.
SteveJ34:
When it comes to dremels or rotozips, there are always differing opinions.

I use my dremel for many different tasks but when it comes to precision cuts and the handling required to accomplish it, its just not the best tool unless you have some sort of jig.

My experience in such situations particularly with MDF is the dremel tends to have a mind of its own much like a cat, child, or teenager in terms of where it wants to go when.

For the something as intricate in design as the example you outlined, a scroll saw would probably serve best but how you accomplish that on something as large as a arcade side piece might be a bit trickly.

An alternative might be to cut out a hole in the cab side then do your design on a seperate piece of material and fit that into the hole you cut, patch and paint.

....or mount it from inside for some "depth".

Just an idea.....

Steve
Jabba:
Definately a scroll saw *could* do the work on something that intricate. MDF is pretty hard though, so it might not work. Typically you use a scroll saw to carve out thinner (1/8 to 1/4 ") stock.

That being said, I used my scroll saw to carve out the profiles for Cub Cars (12 in total) for the kids a cubs. This was basically a 2" piece of pine. Scroll saw got though it, but I had to change the blade every third car and had to go slow. I'm sure it would work for your pattern.
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