Rib has brown stuff on it helppp

[Enrico 1]

Hey Guys , I recently got my boat back from a friend whos place it was staying at for a few months due to me not having space to store it and now that its back it has these brown patches on it. He says that during a bit of a storm the cover came off and it was out in the sun for a week while he was away on work. I think its uv damage but im not sure, is there any way to repair it? I would hate to lose access to my boat right before summer. The brown area is not stickey like some people describe it but its made the rib feel alot more stiff in the damaged area when its deflated. I would add an image but the pictures are too large to add file size wise.

 

Thanks fellas

[Addem 121]

Hard to tell without photos. Easy way to reduce if you have windows is explained here:

https://support.microsoft.com/en-au/topic/compress-a-picture-4598c336-688b-4ade-a582-ef966a978ffd#:~:text=The compression options in Microsoft,pages or e-mail messages.&text=Select the picture you want,and then click Compress Pictures.

[Enrico 1]

Cheers, its on my phone but i think ive got it, should be viewable soon

[Addem 121]

My uneducated guess is that it is some sort of chemical damage. A tender should have considerable UV resistance. Mine is outside on the davit 25/7. 

Sun damage wouldn't have the 'run' marks around the edge of the stain.  

[aardvarkash10 1,103]

Suntan lotion

[K4309 396]

1 hour ago, aardvarkash10 said:

Suntan lotion

Suntan lotion is very bad for PVC dinghies. It reacts with the plasticers. I thought it makes it go a tacky / sticky though. It is a known problem though, suntan lotion wrecking PVC. It is probably the most plausible explanation.

[tmouse 3]

Was it sitting under a tree at all.

I have seen similar result from honeydew sap coming from the leaves.

[BNG 54]

I'm also going sunscreen but with some sort of "self tanning agent" included. 

[K4309 396]

26 minutes ago, Guest said:

And clearcoat on your car.

Haha, so you've seen the child sized handprint on the back of my car then?

Sunblock them up then jump in the car to go to the beach... Nekminnit sunblock handprint...

But that stuff must be safe, we lather ourselves in it daily all summer.

[Ex Machina 390]

6 minutes ago, K4309 said:

Haha, so you've seen the child sized handprint on the back of my car then?

Sunblock them up then jump in the car to go to the beach... Nekminnit sunblock handprint...

But that stuff must be safe, we lather ourselves in it daily all summer.

Boat came with a permanent sunblock handprint on dodger clear 

[Enrico 1]

Thanks for the feedback so far guys, if its chemical do you guys think it can be repaired, where I had a strap going over it it is not damaged so maybe a chemical interacting with the uv and causing it?

[Enrico 1]

After talking with a few more people they reccommended using a high grit sandpaper to see how deep it went, luckely its just the top layer so using wet 600 sandpaper ive gotten most of it off and its just whats left down deep in the weave. Here is a side by side view. Hope this helps anyone in the futer and if yous have any ideas on how to get the last of it out id be keen to know. 

Cheers fellas