Originally Posted by BigE
What's the effect on the structure? Flatter every time?
The more I think about preparing a bunch of fiber pads and keeping my palm sander handy, the more I like it and see other uses.
The more base you take down the more impact on the structure. For cold temps (now here), (+/-) 180 grit sandpaper might be a good grit size to replace structure with a few passes, or with stiff brass or steel brush or rilling tool. As things warm up, a coarser/more aggressive structure may be desired. The fiber pad or fine sandpaper allows you the option to also reduce the structure from warmer to colder temps. In my view if you are precise with your edges, structuring needs the same level of care and focus.....but is very easy and forgiving.
FWIW below (before using fiber pad to clean up and note weld patch at bottom) is what I do for spring conditions with low fluoro, hot with excellent results. The smaller teeth on the other side are good for cold temps. Variable pressure on the coarser teeth can be controlled for mid temps if you really get into dialing in structuring: