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Based on your answers it seems that using MF pads will take even longer because you need to clean them more frequently. Is it still worth it by ratio of time with MF vs. time with foam?
Also, what if you don't have compressed air? Or do I need to get an small compressor (uh-boy, more $$$).
IMHO the MF pads make the job
much faster. Yes, with foam you can work longer without cleaning, AND you can just work till the pad is full, throw it in the cleaner bucket and grab another one. BUT...
you have to clean on the fly at the very least, which takes longer than blowing out a MF pad does.
I find I use less compound however when using a MF pad. And what you do use seems to work better. They do NOT like being wet with material.
Don't need a big compressor, but there is NO WAY I'd do MF pads without one. One of the little pancake types will work, although it'll run and refill with every pad cleaning. Mine is a little bigger than the small pancake ones, (dual tanks - stacked) and it runs down with every pad cleaning. It does keep up though and has no problem doing the job.
Can you do the same (
level of) correction with foam as MF?
I'd say so. (
but it'll take yellow pads, and I've got a TON of them!)

Can you do it in the same amount of time?
I'd say NOT! (
Might take twice as long)
Clean is a relative thing with MF pads vs. foam. It's possible to blow them out good and just put them back in your bag. Next time you need it, slap it on and hit it with some fresh air and you're good to go. As long as they don't have crud in them they'll perform. Try storing a foam pad with ANY compound in it and it's useless next time you start.
That being said, I always wash mine at the end of the day. Foam however I'll wash DURING the day to keep material from drying in the pad(s).
JMHO of course.
