Render Systems said:
Buy Marshall town stainless steel mate they will last for years, worth every penny
I get the pre worn ones now but if in a hurry to wear them in i use them on rendering jobs first... if in big hurry i would use wet and dry along the edges... but to be honest the amount of work i do i allways have enough trowels going through the breaking in stages... my skimming trowel is now over 1 inch narrower than when i first started using it 5 years ago
take ages to get worn in nicely though