Capping a Toilet Flange

I have a small "powder room" in my house which is never used. All it has is a toilet and sink. The water pipes to that room are disconnected. There were some broken pipes when I got this home because the pipes had frozen before I bought it. I replaced the pipes but not to that room, because they are very long, and I saw no reason to need a powder room. There are no kids, so the main bathroom is all thats needed.
In the meantime I always have small repair projects sitting on my computer desk or the kitchen table. Rather than having those projects laying around the house, I am thinking about turning that powder room into a repair shop. It's a little small, but I can make it work.
Removing the sink is easy. Just remove the sink itself and cap the pvc drain pipe. The cabinet under the sink will work well as a place to put tools and parts, and a piece of plywood will make a good top to put my projects.
The toilet is on the other side of the room. I want to remove that and put some shelves there. But I dont want to remove the toilet flange (for resale value, not to mention having to change the piping). I just want to CAP that flange. It will be under the shelf, so appearance is not an issue.
Do they make some sort of cap for a toilet flange? (It's PVC). I suppose I could use plywood or metal, but I want it sealed properly so sewer gas dont leak into the room, (or sewer water if there ever was a backup). I did look at one of the "big box" home stores and did not see anything. I imagine this is something I'll have to buy from an actual plumbing store, or buy it online. (If such a thing exists).
Anyone know if there is something made for this, and what it's called?
Also, if I do have to make something, I'm sure some silicone caulk would make a tight seal, but first I'd have to remove all of the old wax seal residue. Is there some solvent or something that will remove that wax?
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On Thursday, January 28, 2016 at 7:06:48 AM UTC-5, snipped-for-privacy@unlisted.moc wrote:

theres a fernco like device for such applications. you put it in the pipe and tighten a bolt, which expands the rubber
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On 1/28/2016 7:06 AM, snipped-for-privacy@unlisted.moc wrote:

3 or 4 inch (measure the ID of the pipe & use a "Test Plug"
https://img3.fastenal.com/productimages/0481137.jpg
MikeB
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snipped-for-privacy@unlisted.moc posted for all of us...

I can see, once again, you really did your research. DAGS In your own words to yourself "I imagine I ain't too bright cause I get the same answer every time"
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