as long as nothing breaks its whatever works for you , my way is different but sort of same , or use a puller ? just be careful where you wedge as the plate is thin in places .
i just use a thick screwdriver and a firm tap with a plastic/hard rubber hammer so as not to bend or damage the threads . deadblow hammer . but yours is rusty so soak it a little in wd or the like a tad first just take off the nut and spray it , then when removing put the nut back on as you said , flush with top of thread
