3D CAD PRODUCT DESIGN - Aerosol “Stencil Cap” with Paint Collection Bottle
Budget: $250 – $750 USD
Project Overview
I am developing a functional aerosol accessory for graffiti artists called a Stencil Cap.
This device mounts onto a spray can and reduces paint output to allow extremely fine controlled lines for stencil work and detail painting.
This is a real physical product that must be engineered for functionality and manufacturability — not just a visual model.
Reference images of the concept will be provided.
⸻
Core Product Function
The device:
• Attaches securely to a Montana 94 spray can
• Restricts spray output through a small precision aperture
• Redirects excess paint into an attached bottle
• Includes internal geometry to control paint flow
• Supports attachment of a standard plastic water bottle
• Integrates engraved “FREE WALLS” branding
⸻
Paint Capture System (Critical Requirement)
The threaded bottle serves as a paint collection reservoir.
The design must intentionally redirect suppressed paint flow into the bottle.
Internal geometry must:
• Guide excess paint away from the outlet
• Prevent paint from backing toward the spray nozzle
• Allow gravity drainage into the bottle
• Maintain stable spray performance
Designer should propose appropriate internal channel, funnel, or ridge system.
⸻
Bottle Attachment
The design must:
• Support standard plastic water bottle threading
• Maintain airtight fit
• Allow repeated attachment/removal
• Be structurally durable
Designer should confirm standard bottle thread specification.
⸻
Spray Restriction System
The outlet must include:
• Precision small aperture for fine line output
• Stable airflow geometry
• Reduced clogging risk
• Ability to modify hole diameter for testing
Designer is encouraged to recommend optimal geometry.
⸻
Spray Can Compatibility
The rear interface must:
• Fit Montana 94 spray cans securely
• Align properly with spray valve
• Maintain consistent seal and positioning
Designer should request measurements if needed.
⸻
Branding Requirement
The design must include:
• Engraved “FREE WALLS” logo
• Clean professional integration
• Placement that does not interfere with functionality
Logo file will be supplied.
⸻
Deliverables Required
Final delivery must include:
• STEP file (required)
• STL file (required)
• Native CAD source file (Fusion 360 / SolidWorks / similar)
• Preview renders
Design must be suitable for:
• Prototyping via 3D printing
• Future injection molding
⸻
Ownership & Rights (Mandatory)
This is a work-for-hire project.
Upon payment:
• I retain full exclusive ownership of the design
• Freelancer may not reuse or resell the design
• No portfolio usage without permission
⸻
Preferred Experience
Strong preference for designers with experience in:
• Consumer product engineering
• Aerosol or spray systems
• Plastic product design
• Injection-moldable geometry
⸻
To Apply
Please include:
• Examples of functional product CAD work
• Software used
• Confirmation you can deliver STEP + native files
I am developing a functional aerosol accessory for graffiti artists called a Stencil Cap.
This device mounts onto a spray can and reduces paint output to allow extremely fine controlled lines for stencil work and detail painting.
This is a real physical product that must be engineered for functionality and manufacturability — not just a visual model.
Reference images of the concept will be provided.
⸻
Core Product Function
The device:
• Attaches securely to a Montana 94 spray can
• Restricts spray output through a small precision aperture
• Redirects excess paint into an attached bottle
• Includes internal geometry to control paint flow
• Supports attachment of a standard plastic water bottle
• Integrates engraved “FREE WALLS” branding
⸻
Paint Capture System (Critical Requirement)
The threaded bottle serves as a paint collection reservoir.
The design must intentionally redirect suppressed paint flow into the bottle.
Internal geometry must:
• Guide excess paint away from the outlet
• Prevent paint from backing toward the spray nozzle
• Allow gravity drainage into the bottle
• Maintain stable spray performance
Designer should propose appropriate internal channel, funnel, or ridge system.
⸻
Bottle Attachment
The design must:
• Support standard plastic water bottle threading
• Maintain airtight fit
• Allow repeated attachment/removal
• Be structurally durable
Designer should confirm standard bottle thread specification.
⸻
Spray Restriction System
The outlet must include:
• Precision small aperture for fine line output
• Stable airflow geometry
• Reduced clogging risk
• Ability to modify hole diameter for testing
Designer is encouraged to recommend optimal geometry.
⸻
Spray Can Compatibility
The rear interface must:
• Fit Montana 94 spray cans securely
• Align properly with spray valve
• Maintain consistent seal and positioning
Designer should request measurements if needed.
⸻
Branding Requirement
The design must include:
• Engraved “FREE WALLS” logo
• Clean professional integration
• Placement that does not interfere with functionality
Logo file will be supplied.
⸻
Deliverables Required
Final delivery must include:
• STEP file (required)
• STL file (required)
• Native CAD source file (Fusion 360 / SolidWorks / similar)
• Preview renders
Design must be suitable for:
• Prototyping via 3D printing
• Future injection molding
⸻
Ownership & Rights (Mandatory)
This is a work-for-hire project.
Upon payment:
• I retain full exclusive ownership of the design
• Freelancer may not reuse or resell the design
• No portfolio usage without permission
⸻
Preferred Experience
Strong preference for designers with experience in:
• Consumer product engineering
• Aerosol or spray systems
• Plastic product design
• Injection-moldable geometry
⸻
To Apply
Please include:
• Examples of functional product CAD work
• Software used
• Confirmation you can deliver STEP + native files