To speed up the removal process, the salon may choose to use an electric drill or extremely coarse file to remove the MMA acrylic. Since it may be difficult to see where the nail has grown, the chance of filing into the natural nail are great, often leaving behind a damaged, thin nail plate leading to permanent nail deformities. I would recommend filing the product thin and leave the remaining layer on until it grows out. Once the product is cured there is no danger to the client and would create less damage to the nail in the long run. An unusually powerful, noxious odor.
Volatility is what gives acrylic products their characteristic odors.
Smaller methacrylate molecules are more volatile, producing a much stronger odor. MMA is the smallest methacrylate molecule used, hence the powerful odors associated with these illegal nail products. For discount salons, cost outweighs the safety factors. While MMA monomer may cost less to buy, the health risks are more costly in the long run. The sad thing is many times the salon techs have no idea that the MMA liquid is dangerous or that is, in fact, what they are using.