TBH, Im no fan of the crud catcher. It's beautifully made, but I believe chasing the wrong problem.
My bike front cover corroded around the belt cover bottom bolt leaving a big sack under the paint. When I got the belt cover off (complete with the top two screws sharing off) the whole area was corroded. No crud got to either of those areas. When I removed the cover for stripping and painting, the central area (where stones should hit it) was clean. However at least four of the lowest cover screws had corrosion running from under the screw heads. It was a mess.
Brother's bike was polished and mollycoddled from new. So much so the engine was still tight at 12000 miles. He had a crud catcher so didn't worry about cover corrosion. But based on my experience he took it off to have a proper look. His was even more badly corroded than mine - again around the retaining screws.
Both now have the retaining screws coated with anti seize paste from end to end. Mine has stainless screws (also slathered) with copper washers under the screw heads. To date the corrosion has not returned.
The paint is uber hard so if you ever have to strip the cover it will need to be dipped. If metal is pitted, clean it out really well then etch prime, fill and paint. If it's not pitted you can powder coat it.