Yes - there are resins that could be used to make climbing holds. You'd probably want to embed some metal inserts and use a fiber-filled resin, but a little research should point you in the right direction. You could call the folks at Smooth-on.com and see what they say, and I would imagine you could do the same to Freeman Manufacturing (the makers of the video) www.freemansupply.com/

http://www.dickblick.com/categories/moldingcasting/

not same stuff but just as high of quality without having to purchase large quantities.

Use the Castin'Craft resin and the Smooth-on OOMOO 30 silicone. very easy to work with.

Smooth-On.com as well as www.freemansupply.com (the makers of the videos) sell both resins, fillers, urethanes and silicones- if you do a search for casting resin, RTV silicones, etc you should find a number of suppliers. Over the past few years, this stuff has gotten a LOT easier to obtain - and a lot easier to use.

hardware and art supply stores can order this stuff if they don't already carry it

Yes - polyurethane resin can be painted - as can most cast-able materials assuming you use the correct primer and paint. The important thing to keep in mind is to clean the parting compound off of the casting very thoroughly - or your paint will simply fail to bond. Don't ask how I know - lol.

I've done a fair bit of casting, and I usually use a vaseline and naptha mixture. Dissolve some vaseline in about an equal amount of naptha, paint it on with a brush working it around to get a good even coat, let the naptha flash off and you'll have a very thin coat of vaseline which will work well as a parting compound.

I use spray olive oil on my uni project. it works better than store bought release agents lol

it said you did not need it but it made things easier

I agree.