Bonnie , The Nookery is so light I could easily pull it by hand over my gravel driveway ... The simple construction made it Strong ... and as far as the material , i refer to the Sledge hammer test ... (see Pic) I’m a sorta’ Large person 6’3” and I really swung than sledge into the foam we'd removed from the Foamie build ( window cutout) Big dent , no pass through ... as foam compresses it gets DENSER , quickly !!!
Mike , OK , I see your point ... we’ve been “blabby”
Step One .... Surface preparation ... Canvas will only cover so much ..... best fill in the dents and gouges that happen with some lightweight Vinyl spackle . Then BLOCK sand the whole surface smooth as you like ( 60-80 grit), to break the gloss on the surface and give the foam some “tooth” . Sanding a surface before painting or gluing is a common practice. Vacuum well after that with brush attachment ... The more little loose bits you remove , the better the glue sticks ... Some choose to perforate the surface with a wallpaper perforating tool .... That works well , and is optional . Then , wipe the surface down with something to remove the oils from your hands ... when we touch something we leave traces of skin oils , which may interfere with glue adherence... We’ve used 91% rubbing alcohol on a clean rag , and have been experimenting with common household Vinegar ... (not flammable , non-toxic, but more rubbing )
Read the glue instructions .... Most all say “ apply to a CLEAN , DRY surface ... so that’s basically what you need to do ... Any questions ... ?