Sanding plaster that has spalled

BMC CS

Member
Apr 29, 2020
5
Minneapolis
Hi. I've been trying everything I can think of to avoid having to re-plaster my pool as the ROI just isn't there for how long I plan to live here. I have about a 20 Y/O in-ground pool with several sections on the walls where the plaster has flaked off. I've removed all loose plaster with a wire brush and am about to start sanding with a diamond pad to try and "feather" the spots so they're smooth to the wall. Doesn't need to be perfect, but it needs to be OK. Is this possible? I've never seen anything about it which leads me to suspect it's a bad idea. Anyone with advice would be very much appreciated!! Thank you.
 

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BMC CS

Member
Apr 29, 2020
5
Minneapolis
The blisters were very shallow (<1/8"). No exposed cracks/rebar/rust. even concrete. I've never found any info regarding filling gaps that shallow, so I figured I'd have to sand them smooth. Just want to bounce that off people that have more experience than me before I dig in.
 

jimmythegreek

TFP Expert
Bronze Supporter
In The Industry
Aug 10, 2017
2,841
Morris Cnty NJ
Your better off using some bonding agent and mixing a small batch of plaster and filling it. Yiu can also do same and use epoxy grout which you can feather in and it's safe underwater. Whatever you do, do it 2moro. Leaving pool dry with old plaster is asking for trouble it wants water to keep living
 

BMC CS

Member
Apr 29, 2020
5
Minneapolis
I have some Patch-it from Leslie's Swimming Pool Supply. Is that the same thing? Sorry if these are dumb questions - there's nothing I've found online that is very clear on this.