I'm noticing the bolts in the main beams for the screen enclosure over the pool are rusting. My concern is that these rusting bolts are contributing to the many stains in my pool. I will be having my 34 year old fiberglass pool refinished shortly and if these rusty bolts dripping down on my pool are causing staining I will replace the 34 year old cage before the refinishing of the pool. There are many different stains in my pool now but none of them are rust. So my question is , will these rusty bolts cause staining on my newly refinished pool surface?