[Boatanchors] Carbon Comp Resistors

[jeff bauman]

I too have endless miles of old carbon comp resistors.  And just about all of them have changed value.IIRC, i have read where some have had success bringing them back to value by heating them in an oven, but I think most have discarded that treatment as ineffective.So ... my question is:  can I use a resistor that say, has drifted up 40% to 100K ohms as a 100K ohm resistor?  Is it apt to stay within 10% tolearnce after use?Guessing this has been "asked and answered" but hopefully someone can indulge me on this list.Thanks.JeffW8KZW