[DobbysGamertag]

pawn Код:

public OnPlayerRequestSpawn(playerid)
{
if(adminvariable, < level)
if(GetPlayerSkin(playerid,SKINHERE);
return SendClientMessage(playerid,-1,"Skin for admin use only");
ForceClassSelection(playerid);
return 1;
}

There might be a better way to do it. But i'd do it this way I'll go test it now