You would need to spray the back side of the metal with a weld through primer, it has a lot zinc in it that will become a liquid and flow over the weld surface, the heat from the weld lets it flow.
It is difficult to tell how large the spot is from the picture, but if it was my car i would weld in a patch panel
If that is not an option, make sure to use a fiberglass infused filler, itwill hold up better over time
I have no experience with that eastwood product, but from your picture i...
Definitely strange, I have never had a problem getting 2000 grit marks out, even using a foam polishing pad and polish.
I would try wet sanding it with some 3000 Trizact and hitting a polish if you have any on hand.
What was your process for painting, did it involve a high build primer or a heavy coat of sealer, either of those not given enough time to fully cure
could cause shrinkage, leaving sanding marks from whatever grit that was used under them.
Do the sanding marks look more coarse than 2000 grit?
Thats good info to know, i rarely get a chance to buff out clear that is fully cured
The average age of the paint i normally buff is 24hrs old so still a bit on the soft side.
Is it april 1st, is this some kind of test, but seriously i dont have any experience with the sponges in question, but i can recommend the dreadlock washmitts that AG sells they work great for me and are on sell now.
I have experienced this with strong citrous cleaners, the chemical actually swells the paint and gives the look of orange peel. I would give it a day or two and allow the chemical to evaporate fully and if it still has the appearance of orange peel,
you may need to wetsand and buff it out.
Frame grease is what i call it, nasty stuff for sure in hot weather, your best bet is a garden hose.
Under no curcumstance agitate with a brush, don't ask me how i know.