Flowcoat is cheap and gives a good finish. It is the same as gel coat but you have to add a small amount of wax, this rises to the surface to form a skin (you can't see it), the skin allows the flowcoat to harden. If you want to add a second coat or paint it, give it a good wipe down with meths first to remove the wax.
You can have it mixed to a RAL colour to match your preferred colour. Makes it very easy to wash mud and road grime off and looks much neater.