lol actually done that on the duff exhaust valve, cut it out then with the file and then a bit of sandpaper the valve was as good as new actually! lol
I am aware of the price of cutters matey, had a set, they cost me about 3 sierras (1.6 and 2 2litres lol).
I have used the Neway hand cutters and mate they are excellent. I woudl proudly put my name on them.
http://www.newayts.com.au/default.htmhttp://www.newayts.com.au/default.htm thats the austrailian web page the best one as a matter of fact. Gears lovely mate.
Chemical cleaning is never all its cracked up to be. Even with blocks and heads, you still need to clean them by hand when they come back.
I only replace valves if they are knackered discoloured (the base metal) or the guides are worn. Unless its someone elses head and they want new valves to save a bit.
Even with new valves you need to clean them up, you need to polish em or you get the veiny thing on the back of the valves.