Early on in my pedal steel adventure I used a bit of compression, in a subtle fashion similar to what Calum is describing to give a wee bit of help with sustain etc. As time progressed I found I preferred to just use the volume pedal as it gave me more intimate control over these factors, also compression tends to suck tone a bit even when used in a subtle fashion.
Call me old fashioned if you will. I do like to use compression on 6 string guitar though, using a volume pedal on guitar is not really practical and compression used wisely works well.
The good news for me is I sat down at my steel yesterday for the first time in 5 months since my cancer diagnosis and found I can play it again up to a point, I have just finished my chemo regime and the pain I have been subjected to has seriously diminished, so I can play for about an hour before it gets a bit much. This includes using pedals and levers.
Bit off topic but I'm just so happy to be able to play again I couldn't help sharing this.
