rear end powder coating question

[scherp69]

I have a question and need to get some input from people who have experience with powder coating. I plan on getting my rear housing powder coated. It's Moser M9 housing with a back brace welded on. I'm waiting for a rear sway bar that I've ordered. Once it get here, I want to drill the holes through the back brace for the brackets. My question is regarding the back brace and having 4 holes drilled into it. Obviously right now the back brace area is sealed and once I drill the holes, moisture will be able to get in and potentially rust the housing (although it would take a while). Would I be better to drill the holes a little bit bigger so the powder coat fills the new hole and gets inside the back brace a bit or would I be better off mocking up the sway bar with brackets in place and then welding the brackets to the housing and filling the new holes? Hopefully this makes sense. Thanks in advance.