Tape the area
lay on realy thin coat of acrylic
rub up with plastic trowel
take off tape
Rub up edges with sponge to blend in
rub up with plastic trowel again on edges
This is roughly guideline how to patch up acrylic if u cant do it right...
There is no need to pin boards upto 12m height. Over that winds are stronger and pinnin is needed. Wet fix only boardin needs sticks to wall atleast in60%, wetfix with pinnin 40%. Personally i will pin every board no matter what height for peace of mind. Wetfixed boards only can be ripped off...
Make sure any water wont go behind system, all gaps between boardin are filled in with expanding foam, pins not stickin out or hammered in to much, any lips on boards needs rasping back, scrim is overlaped atleast 100mm, stress pads every corner every opening, dash it then. Parex is good powder...
Polysterene and mineral wool boards are only ones u can rasp back. Over 5 years since we do ewi havent seen many people rasping boards. Cause in most cases its mechanical fix onlyand boardin follows shape of the walls u get odd lips which should be shaved back. On phenolic all u can do is patch...