Loved the DVD good value for money, Hope you can help. I am confident that I am laying on to correct thickness and achieving pretty flat finish, but were I seem to have a problem is when I get to the final stages of troweling, it's the stage were the plaster is changing from creamy colour to darker blotchy streaky colour . The wall looks like it has a skin and if left it comes off with my watered down paint mix. If I try to clean it at the troweling stages I seem to be taking the nice finish back off leaving half smooth half rough which then shows in painted finish. Am I simply doing final troweling to soon or to late or not trowelling enough I am confident that I am putting enough pressure on final stages but not sure. I have a top class marshal town trowel don't think problem lies there. Any help would be great
I am thinking it may not be a troweling issue but possibly more with the application. If its peeling off it is more likely to be either a bonding or suction issue.
The plaster can flake off when troweled if it becomes too dry underneath - or the exact opposite and the finish is being applied to a low suction wall and the PVA has not dried enough before applying plaster.
One of the following 3 points may help:
If the wall was high suction and the plaster firms up in less than 30mins then try controlling the suction either with damping the wall down more than you did or by applying a solution of PVA to seal the surface.
If the wall was high suction and you applied PVA for bonding purposes then make sure it goes tacky before applying plaster.
There is a possibility that the second coat is not adhering to the first coat. This can only really happen if the first coat begins to set before the second is applied. The second coat should generally be applied within an hour of the first or sooner - as soon as it goes tacky.
If you're still having problems you can always email me anytime.