The topic at hand is about the best way to manage skin rashes related to ostomy care, specifically focusing on the "crusting" technique. This technique involves using stoma powder and a liquid skin barrier to protect and heal irritated skin. The main concern is whether applying the liquid barrier first might prevent the powder from working effectively. Here are some helpful insights and advice on this topic:

- For the correct order of application when "crusting":
1. Clean and dry the skin thoroughly.
2. Lightly dust the area with stoma powder.
3. Gently brush off any excess powder.
4. Blot or spray a liquid skin-prep or skin-barrier film over the powder.
5. Allow it to dry completely.
6. Apply the wafer.

Applying the barrier first is not recommended, as it can prevent the powder from adhering properly and absorbing moisture.

- To neutralize acidic output burns:
- Dab Milk of Magnesia on clean, dry skin. Leave it for several minutes or let it dry completely before applying the wafer. This can help counteract acidity.

- For treating stubborn, bleeding, or weeping rashes:
- After cleaning and drying the skin, apply Desitin Extra Strength (a zinc-oxide cream). Leave it on for a few hours, then wash it off and proceed with your normal preparation routine. This has been reported to help heal bleeding rashes when other methods have not worked.

- To prevent mechanical or razor irritation:
- Use fresh, sharp razors or an electric trimmer to avoid dull blades. Wash with hypo-allergenic gentle soap, rinse thoroughly, and allow the skin to air-dry before placing the wafer.

- For managing moisture and heat in skin-folds:
- A light dusting of cornstarch can help absorb sweat and reduce rashes similar to "prickly heat."

- As an antiseptic option:
- Mercurochrome, a topical antiseptic, has been successful for some, though it may be hard to find in the US.

- General tips:
- Ensure complete drying between each step.
- Remove excess powder to achieve a thin, even "frosting" rather than caking.
- Monitor for any product allergies and consider switching brands if irritation continues.