Trying to put a door stay on old holes, not easy to get good fixing strength. Is it better to start again in a different spot. The catch on the body side is fine, it's getting the one on the door right that's the problem.
I generally use sikaflex or the cheaper puraflex to bond things to the motorhome. It gives a solid waterproof seal and I use thin aluminium plate of 1.5 or 2mm which is much stronger than the foil used in the original wall, that has no structural strength other than the bond to the inner foam coreAny recommendations on a bonding material, ours has been attempted a few times.
I think it's a bit more difficult given the sikaflex or whatever around the holes. Id try and remove as much as possible especially just behind the holes then mask the surface mix some epoxy and work it into the holes to try and get a blob of epoxy on the inside and wipe off the excess on the outside before it goes off. When its set drilll a pilot hole and screw into it. As I said it worked for me there are probably some other options too if you could easily get to the back I'd bond a piece of alloy on the back and fix into that it would have be difficult for my repair and have needed a lot of dismantlingAny epoxy or did you have a specific one in mind?
Given the loads that can occur on door stays, I'm not sure I'd trust a couple of screws. I'd probably set a couple of nuts in there and use machine screws.Would you put a plug in there before it sets or just drill then screw
Difficult one do you want strong fixings that will fasten well to the MH wall but potentially dammage it or weak ones that give before theres dammage or like us a long bit or string to the door mirror!Given the loads that can occur on door stays, I'm not sure I'd trust a couple of screws. I'd probably set a couple of nuts in there and use machine screws.