Hello I will share what I did. I had a divet in mine. Also someone else did half ass repair. What i did was remove the old filler that someone used. Clean the area good and wipe down with alcohol. I found it helps the bondo stick to the playfield. I used a bondo glaze purchased at menards. It is rather thin also paint like. Already has harder in it and speads easy. Spread it, let dry, sand, repeat til your happy. I let sit 24 hours between coats. I wasn't in a rush. Once it was flat and was happy with it I installed the decal. But your going to paint it. Even better. I would put maylar down. Jeremy

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It took a few days. I let it cure 24 hours between coats. I was in no rush. Give it cure time. Sand, repeat. Don't rush it. Take your time you will get better results. It has held up great so far. Knock on wood. Yes the magnet will still hold the ball through the bondo. No problem magnetize the balls.

Please show pictures of your Sanctum.

Better picture of repair

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i'snt to bad. you should be alright