Hoatcoating upside down places

This is somewhat OT, apologies, I need a quick answer and know that someone here can help. Might be relevant to some surf context too.

the school I work at has just contracted some non-specialists to renovate the adventure playground. The guys painted it and then brushed a layer of polyester over all the slides and inside the tunnels etc. I watched them do it and told them the resin would never cure enough to sand (the local polyester is actually a reasonable surfboard resin - i.e. isopthallic). No one listened (Indonesian ‘saving face’ culture) Sure enough, the day they opened it the kids ran up to the top of the slide in excitement, jumped on… and stuck.

They’ve now asked me to help out so I’ve showed them how to mix up some styrene with paraffin wax to do a hotcoat resin. This will work for the horizontal surfaces, but I’m wondering how to get a cured sanding coat on the upside down surfaces like inside the tunnel roof. 

Did I read a post somewhere here that indicated you could rub wax over cured lam resin to get the stickies out ready for sanding? Tried searching but couldn’t really find the answer I was looking for.

Thanks in advance!

Tom

Just brush it over the upside down surfaces (thin layers)

The layer of wax acts as a barrier to oxygen, that's what makes the wax kick off hard.   On catalyzed but sticky resin I've used wax paper, a layer of foam dust. plastic wrap, etc. 

You could use a large sheet of plastic 1 mm drop cloth and apply that before you go ahead and do another hotcoat, or maybe shoot the resin with some kind of an oxygen barrier thats water soluable?  Then if that doesn't work just do a real hotcoat on the stuff.

Anyhow why didn't the painters get some LP  2 part epoxy paint from the local boat store. Must stronger, much faster, and way better suited for the job. They even make a 2 part high build epoxy primer that will fill all the nicks and dings in the slide of death....make it look like new.  The whole deal would cost you about $200.00 and take a lot less time than having to sand all the drips from that crappy hotcoat.

Cheers guys

I’ll try thin layers first. If not the wax paper which we should be able to get.

Pretty sure the LP epoxy paint won’t be available here. Stuff is extremely expensive to import in Indonesia so if it isn’t made here, it usually isn’t available. I’ll take a look for a similar local product though.

 

Thanks again,

Tom