To be sure,take the old bearings out for powder coating ,a heat process,but must mask off the bearing housings.Or leave them in as masking but the bearing seals will be ruined so you'd have to scrape off any powder coating to get them out.New bearings on my old girl are cheap and standard.Brute force with hammer and drifts worked for me.New bearings= peace of mind.
If it's paint then no heat involved but is an inferior coating.