Some slight crazing, or spider-web cracks, may appear in stressed areas of new plaster, as at corners. Anything larger is suggestive of trouble, wither the structure is shifting or the plaster was incorrectly applied.
Manual application of true plaster is not common these days. Plaster board (or sheet rock) may develop thin "cracks" in the filler used to bridge over the edges of the boards. Larger cracks, or located in the middle of the sheets, is suggestive of settling or installation problems.
Fresco is a painting technique that uses water-based pigments on applied plaster, and is known to be the most durable technique around. Known to be the oldest technique it has also been called Mother of all Arts and is very hard to master.
Paintings on plaster is called 'Fresco'. It is painted when the plaster is still wet. Leonardo da Vinci's 'The Last Supper' would be one of the most famous frescos.
In olden days of yore plaster was applied over wooen lath which gave the plaster something to adhere to . Thus a much heavier coat of plaster could be applied because of the space between the lathes. the next day a second coat was applied called the skim coat because it's only purpose was to fill in the imperfections left from the first coat. fast forward to now the plaster comes in sheets much the same as sheetrock ex cept it is blue, and rightly called blueboard , after the hangers screw the bluboard to the wall and ceiling a team of plastererscome in and put a skim coat of plaster over the whol board, the joints require a heavier coat. After this coat dries in a couple of hoursor less the plasterers come back and apply a veneer thickness to the wall and dampen the plaster with a brush being waved in front of the board.Thus completing the plaster job. Now a oldtime plasterer like my brother-in-laws brother is a real plasterer and I was lucky enough to have him plaster my house when we built it, would walk off a job if they wanted him to use blueboard., as he is a old time plasterer who is an artist as he makes crown mouldings an other plaster designs on top of a coulple of inches thick.of base plaster. if you get a chance to see a real plaster job and a blueboard job you can tell the difference and both shine over sheetrock and compound job.
Plaster of Paris (but you have to work quickly...)
Frescos are painted directly onto wet plaster on a wall.
As the new plaster dries there may be some slight crazing in stressed areas at corners and the like, but there should be no substantial cracks.
You will get better results if you aim your effort at removing the paneling and preparing the wall board or plaster behind it. Paneling, even if you fill the grooves, will have waves. If I were going to leave the paneling on because it was applied with adhesive that created excessive damage to the wall behind it, I would put 1/4" drywall panels over it and tape and spackle.
repair any cracks or holes with plaster or filler and sand smooth. lightly sand the wall to increase adhesion of new paint. if covering a dark wall with a lighter colored paint, cover wall with primer before painting.
You can plaster a wall with Portland cement and fine sand mixture. Polymers are plastics and I've found nothing on using them in a mixture to plaster a wall.
Fresco is a painting technique that uses water-based pigments on applied plaster, and is known to be the most durable technique around. Known to be the oldest technique it has also been called Mother of all Arts and is very hard to master.
plaster sand
cracks
This wall mount is not designed for plaster mounting,stud mounting is required.
screed
Wall putty..
Sounds like you have a water leak somewhere. It could be from a roof leak, or maybe an upstairs commode, or maybe a water pipe, in your wall, broke.
You can not build a wall out of plaster, you need bricks/blocks/stone and cement to build a wall.