I really don't think you can cut a trim such as skirting or coving without some sort of minimum tool kit.
There must be a zillion power tools on the market for cutting angles but I suspect they come at a premium. I know a lot of people use a large (ish) pair of shears that are made for making mitre-cuts through strips of wood. I chose the more conventional (and cheaper) route.
Having said cheaper, I can't remember what I paid for my mitre block and saw and G-clamp but none of them would have cost much or I wouldn't have them! I had a quick look on line and the prices vary hugely, so I think it is just a case of shopping around.
You will need:
A mitre block can be made in all sorts of materials, wood, plastic, metal.... It has slits which are accurately cut out at ninety and forty-five degrees.
|clamped to the table|
They can be like mine with a sort of guide edge you can run along the worktop to keep it nicely lined up when you clamp it down; others are just plain blocks that stand on a surface.
I think people probably do saw without clamping the block down but I don't have terrific wrist strength and would prefer stability. This is a woman who struggles with a coffee jar!
Imagine this the other way round and you'll see why it is called a G-clamp - I guess any clamp will do. Again, for me, I favour this as it is easy to tighten using its little lever. I suppose you can use it either way up ? I just remember my dad having it this way with the screw part at the bottom.
|razor saw and handle|
This is my razor saw. It comes with a removable handle so you can replace it when it is blunt or, indeed, use the handle for other tools. Basically any very fine tooth saw would probably do.