Substituting electrolytic caps with polyester

[fingersoccer]

Two questions similar in nature:

1) Can I use a 1uF polyester cap instead of a 1uF polarized electrolytic?
2) Can I use a 1uF polyester cap instead of a 1uF non-polarized electrolytic?

I have a bunch of 1uF polys laying about and want to know if I need to make a special purchase to finish a pedal I'm working on.

Thanks

[R.G.]

Yes.

Yes.

A NP cap can be used anywhere a polarized one can, given that you can afford it and it will fit in the space and hold the voltage and RMS (heating) current. In general, a 1uF poly can replace either polarized or nonpolarized electros for all common uses.

If they fit, use them.