I'll be using regular plastic buckets to make some concrete planters, something like this. My goal is to reuse the buckets.
The problem is that she sprayed each bucket (generously) with canola oil and non-stick oil, but the dry concrete stuck really well to the bucket. She ended up having to cut both buckets to remove the concrete planter.
Is there anything I can spray the bucket with so that the plastic doesn't stick to the concrete?