Besides the mask, what gear gets rejected at a tournament? Gloves with holes, grip tape, patches, inspection stamps?
Gear gets rejected for three reasons: it is damaged, it does not meet the specification, or it could hide cheating. Gloves are a common failure. USA Fencing requires a fencing glove whose cuff covers about half your forearm, no rips or holes in any clothing, and taping over a hole in a glove is not allowed. Sabre fencers need an 800N glove at every level, local through national, with a conductive cuff. A hole in the palm to pass the body cord through is accepted domestically but banned at FIE events. If your glove is worn through anywhere, replace it before the tournament, not at the armory table.
There is no fixed limit on grip tape. The test is whether tape changes how the grip works or could hide wires or a switch. In épée the rule is explicit: pistol grips may not be covered with leather or any material that could hide wires or switches, so a taped épée pistol grip is asking to be rejected. For every weapon, any grip that fixes your hand must hold it in one position with the tip of your thumb no more than 2 cm from the inside of the guard, and French épée grips are limited in length. A thin wrap on a foil grip usually passes at locals, but the armorer or referee has the final word.
USA Fencing local, divisional and sectional events put no restrictions on uniform colors or decorations, as long as the uniform meets every other requirement. Uniforms can be any single color except black, and designs on the non-sword arm are allowed if they are in good taste. Sew patches flat and firmly so a point cannot catch on an edge. Large commercial logos fall under the publicity code, which matters more at national events. Names on uniforms are required only at national events such as NACs, Junior Olympics and national championships: your last name in navy capitals on your back or rear thigh. Names printed on tape are not accepted.
At events with an equipment check, armorers test your gear and mark each item that passes with a stamp, sticker or pen mark. Keep those marks visible. Using equipment without the event's control mark is a red card and cancels your last touch, and faking or transferring a mark is a black card. Old marks from past tournaments are harmless, so there is no need to scrub them off; armorers will find space. The easiest way to avoid trouble is to check everything the week before: holes, loose seams, body cords, and spare weapons that pass the same rules as your main one.