I wanted to finish out the are around the oil door to make it truly a flush fit. I had previously filled in most of the gap and sanded it more or less flush, but still had some finish work to do.

I had some epoxy mixed up for a different task so I used a bit of excess to mix up a slurry of micro then troweled it into the gap around the edge of the oil door. The next day after it got good and hard I sanded it down more or less flush.

As is, the border around the door is about 1/32" higher than the surrounding cowl, which is something I think I'll let the painter deal with.

I though for a bit during prep about the best way to get a consistent gap around the edges of the door and ultimately it occurred to me that rather than screwing around with trying to epoxy ups to tape lines or whatever, there was an easier way- I made the door a bit overside with respect to the flange underneath, and once the surrounding surface was final sized for basically a zero gap, I took the door to my bench sander and 3M grinding wheel and took off about 1/32" all the way around.as verified with scrap of .032" used as a no go gauge in the gap.

I feel like this came out really nice.