Thanks for sharing your expertise, Wild West. After posting this topic from my phone, I did some googling and found the following(at the bottom), which really backs up Wild West's comments. It seems like the only real option to safely decorate a completed suit is with the use of correctly manufactured and installed patches.
In regard to the type of racing we're doing - I've been around racing since I was 8, as a crew member, spotter and driver on the competition side. I have also worked at the race track mounting tires and scooping ice cream. I recognize that Arena Racing is on a different level. In fact, that's exactly why we chose it. I like the enclosed driver's compartment and relatively low speeds. I also like that it's in the winter and indoors. Are there cons? Absolutely - as there are with anything we do. I think it's a good fit for what we want to do right now.
We all weigh risk and reward. Some would think it's crazy to allow a 9 year old to drive one of these to start with and I completely respect their position.
Based on the fantastic information shared here, I don't see the reward of having his off the shelf suit being decorated as outweighing the potential risk that this could cause.
Again, thanks so much for your help!
[h=4]Embroidery and Decorative Patch Instructions[/h] The construction of the driving or crew suit, such as the sewing and seaming methods, are just as important to the integrity of the garment as the fire retardant materials used to manufacture the suit. Quilting of the inner liner to the outer layer is standard on all two-layer (and higher) MasterCraft Safety and Impact driving suits. The purpose of the quilting is to improve air circulation and to transfer heat at a slower rate and with less force and energy. The air pockets formed between each quilted stitch pattern delays the heat from being transferred to the body as quickly therefore it is important to preserve this protective air-layer by not penetrating the inner layer of the suit with embroidery or decorative additions. For this reason, MasterCraft Safety and Impact embroider only the outer layer only prior to final assembly of your driving or crew suit.
That being said MasterCraft Safety / Impact is one of the few manufacturers worldwide that can custom embroider only the outer layer of a suit prior to it being constructed together in final assembly. Only the original suit manufacturers have access to the outer most layer of the suit during its garment manufacturing process. To maintain the integrity of your suit, aftermarket embroidery and adornments should never penetrate the inner protective layer(s) and any additions to the garment should not interfere with its intended use and/or the thermal protection properties.
Should you require specific sponsor branding and similar adornments added to your suit after purchase, patches conforming to the ISO 15025:2000 standard for protective clothing are highly recommended. To maintain the thermal protection rating and overall integrity of the suit, MasterCraft Safety and Impact recommend that patches and badges should be manufactured from fire retardant thread and material (such as Nomex®) and should comply with the ISO standard 15025:2000. The patches and badges should also be affixed to the driving or crew suit using a fire retardant thread (such as Nomex®) and the thread should only penetrate the outer most layer of the driving suit. Glues and other adhesives (including iron-on methods) are highly flammable and should not be used to affix the patches or badges. The backing material of badges and patches should be flame-retardant and in conformance with the original intended purpose of the suit. When affixing adornments, heat-bonding should not be use and the garment should not be cut or otherwise altered.